The Basics

To start things off with the most basic of basic things, I’ll explain how the overall game functions.
Game modes
The game consists of two game modes: Classic Survival and Team Deathmatch (TDM)
Classic Survival- Spawn into a server, loot items, fight other players, get geared, get kills and survive as long as possible until the extraction zone appears, allowing you to leave safely with all your loot.
The point is, you gather loot and items and if you manually leave, you’ll loose your items hence you must get to the extraction zone (a small area on the map in which you have to stay in for 10 seconds in order to leave) and wait out the 10 second timer. Once you leave, you get to keep all your items in your inventory. The items can be sold and traded in main menu for in-game currency.
Team Deatchmatch (TDM)- 2 teams. Fighting each other. Fight the opposite team to acquire loot.
Main Menu
On the main menu you can see 4 things on the top of your screen.
Home- You could call it lobby, with your character showcased in the middle, friendslist on the right, lobby quadrant below it (shows how many players are in your lobby) and news about the game in the bottom left corner. To the top left you can see your Steam icon and the level (the levels don’t seem to work at the time of writing).
Servers tab- Shows the server list with most basic information like player count and gamemode
Inventory- Here, you can see all the stuff that you collected and stored to the left and your character inventory in case you want to store something from a previous game. Items and guns can be dragged into the inventory quadrant and vice versa. 
Trade- In this tab you can drag your items and weapons (prices written next to them) onto the trade tab if you want to sell them (put the items into the empty slots), if you want to buy anything make sure you have the money in your inventory otherwise it won’t work. Simply pull the item into your inventory and money will be taken from you. Don’t forget to store the rest of your money (if there’s any left) back into your inventory.
Lobby quadrant- Invite your Steam friends into the lobby, everyone needs to press ready and the lobby leader needs to press start, and you will all be spawned in the same spot on the map and will be able to see each other’s names when in close proximity (apx. 500 meters).

Survival

Here, I will explain the basic survival techniques.
Hunger- Hunger can be deadly. It’s slow but if you don’t eat anything for too long it surely won’t be beneficial for you. Try finding some food around, on the shelves, cupoboards and fridges. Most of the food you find will be canned, so you’ll be required to have a crowbar, hatcher or a can opener (simply drag the tool onto the can to open it), but you’ll come across various chocolates and other foods. Eating food restores hunger and gives you health and heals you.
Thirst- Thirst can be deadly too. You can find many sorts of drinks around, and it’s easy to find. Water, juices are very common and restore thirst aswell as give you more health. Keep in mind Wine, Vodka and Whisky make you more thirsty and make your temparature go up, preventing your body from freezing. So, if you’re thirsty, don’t drink those.
Temparature- Low temparatures are deadly in snow conditions. Almost immediately upon spawning you’ll start having frostbite. It starts fast and once you reach “Severe frostbite” you’ll start to die. The frostbite will start taking 5 hp every 30 seconds or so. Craft a campfire or find one in order to prevent this. As written above, alchocol helps but make sure you have drinks because you’ll be thirsty!

Crafting- Crafting is a part of the game, obviously. You can craft items by simply dragging the required items over each other. For example, campfire. Campfire can be crafted using wood, newspaper and a ligher/matches (there’s other alternative materials like oil), simply drag the wood over the newspapers and drag the ligher or matches over the item you just crafted, it will open up an interface that allows you to place the campfire, using left click. The campfire/matress has to be placed over a flat area.

Combat-Guns are simple to use. Right click to aim and left click to shoot. As long as you have the bullets, you should be good to go. Each gun takes its own bullets which you can check while holding a gun or while in inventory.
Backpacks- Backpacks can carry diffrent amounts of items depending on their size, a small backpack carries less than a big backpack. Each item has its own weight, and the capacity left in your in-game inventory can be seen below your inventory slots, expressed in procentage. If it says 64%, it means you’ve used 64% of your space, so find a bigger backpack, and if you have the biggest one, well, sorry.
Gear- From clothing to helmers, you can find all sorts of survival gear. Helmets protect you from taking damage but can be taken off, and diffrent sorts of clothing helps you with cold, Gear can be found spread everywhere on the map, and it is very common. Although, cupboards and torn down cabinets are almost certain to have some sort of clothing.

The Map

Here’s the map, and I’ll explain some things below it. 
The marked spots on the map have been made by me and my friend.

The map is really big and wide. It represents what is assumed is a Russian post-apocalyptic wasteland and it doesn’t seem to have a name. Although, many are calling it “Карта” which translates to “Map”.The map is set in the USSR. It consists of an island in the middle of the map, sorrounded by a frozen river and neighbouring villages and cities. I’ll describe some monumental buildings on the map below.

The Crane– The crane is the industrial area located on the island, you can recognize it well, by a crane. You’ll also see 2 nuclear power plants nearby, and that usually works like a compass to find the crane. It’s hectic, it’s a spawn area and it has decent loot, but usually already looted.
Heli pad– Where helicopter spawns, sometimes there’s people, so watch out.
Windmill– Easily recognizable, a small windmill stationed on the island, used as compass to find other places.
The bridge– A small, tiny bridge located on the Death Valley or the frozen river. It’s usually very hectic there, with lots of group fighting for loot and lot’s of dead bodies. No loot spawns there.
Death Valley– A giant area on the map, rather than a town or a city. It’s one of the most busy, if not the bussiest part on the map. It’s a ravine that streches around the island, on parts its wide, and on the other parts it’s more narrow. If you stay too long, you’re almost guaranteed to die, as there will most likely be people shooting from both sides of cliffs. Make sure if you travel, travel alongside the cliffs or by taking cover on the small islands on the river. Loot-wise, not much loot except the stranded boats have some loot in the cabins.
Church– Represents the icon of the town of “Mikhailovsk”. A medium town located in the south-east of the map.
Green building– It’s a tall, big green building located in north-east of the map. It can be seen from miles away and it’s very distinctive. Used as compass to other places, but the building itself is used as a camping spot as it is very high up and it’s located in the town of “Grishino” which itself has a decent amount of loot.
Bunker– A place to go. The most high loot spot on the map, located directly in the North. It can be found in an abandoned building, and in the building there’s ladders leading down to the basement. In there you’ll find a generator that you have to fill in gas, and find an elevator and press the button. Once you’re in, wait it out and you’re in the bunker with god-tier loot. Make sure you’ve put enough oil so you can get back. Also, look out for campers on the top and in the bottom.
Hospital– One of the biggest buildings on the map, by area. It has a decent amount of loot and meds and it’s located in the town of “Andronovo” which also has a pretty good loot.
School– A very monumental building located on the very west of the map in the town of “Stepanovo”. It has medium-tier loot.
Fire Station– Well, a fire station in the south-west of the map, monumental and has good loot.
Station– Used as compass to other things. That’s usually how you know you spawned in the very south, on the edge of the map.