Take all of this with a grain of salt and understand that in a lot of these things, I'm an idiot. But here are some thoughts . . .
For your classes, maybe start going to them. It seems like a lot now, since your so far behind, but the more you wait the harder it will be to get caught up and the more scared you'll be of going, creating a horrible positive feedback loop that gets more and more difficult to break.
For your projects, do them to the best of your ability, finish them. Then go to your professors with them in hand, acknowledge the mistakes you made and the lateness of the assignments, and see if they'll give you some partial credit, or at the very least, some advice to getting caught back up in class.
For self harm, see some help if you can. I don't know about Russia, but in America almost every college has counselors, priests, etc. that are there to help students with the non-academic tests life brings us.
You are smart. You are strong. You want good things in your life. Embrace yourself and you'll find the strength to see things through.