Generally, you can't use "for" as a conjunction at the beginning of a sentence. Most of time, "for" is used for giving reason. ex- I am here, for she is ill. You can edit your sentence adding 'comma' in place of 'period' just before for.

What is a good sentence starter?

Some words are indeed notable for being good sentence starters. The list will include the following: although, I would like to, first, meanwhile, therefore, subsequently, while, I would like to, moreover, in general, in addition, furthermore.

Can you start with for?

We all know that for acts as a coordinating conjunction as opposed to a subjunctive conjunction, so it is clearly okay to begin a sentence with "for," though some misinformed teachers would forbid it.