Caught Shoplifting Groceries in New York

My question involves criminal law for the state of: New York

I was caught attempting to shoplift <$30 of groceries from a ShopRite. The police were not called, however, I was asked for my name, address and DOB (they did not ask me for my SSN). I signed the paper and the LP told me that I may or may not receive a letter with a fine.
I'm very much ashamed of myself and I know what I did was wrong. I have some questions, just so that I can prepare myself psychologically (I deal with major depressive disorder/suicidal ideation/generalized anxiety disorder). I also have no money, to be honest, so I'm panicking over how I might pay the fines or how I might afford a lawyer.
1) What is the likelihood of them sending me this fine?
2) How much will this fine likely be?
3) I've read in some places that I should NOT pay this fine, although I'm inclined to do so due to knowing what I did was wrong. What should I do?
4) What is the likelihood of this becoming a criminal matter?

Pursuant to New York General Obligation Law Section 11-105, if the merchant was able to resell the merchandise, I would expect the civil demand to be $75. If it was unable to do so I would expect the civil demand to be $105.

It's up to you, whether or not you pay a civil demand. When a store does not call the police and says that it will only be sending a civil demand, that's normally what actually happens. You can potentially shift their calculus if you don't pay the civil demand.