I keep ******* up in life.?

Well basically I'm 14 and keep ******* up and I have no idea how to stop and sort myself out. It started with cutting a few years back and then I started to O.D. Yesterday I was out with friends and had my first drinking experience drunk a 1/4 of a bottle of vodka was okay but later blacked out and went unconscious for 3 hours and have a grazed face and by tomorrow a black eye... I'm on a warning to be sectioned and tbh I think I want to be to sort myself out. Been put down as argent with my psychologist...