school has always been so hard for me, and i am at my limit.

i've failed school twice already(i'm 18F, 11º year), years ago, and school has always been the main reason i'm depressed. the more i think of it, the more i want to quit and start working or do something else. I really need some opinions on this (even tho you don't know me) if someone has a similiar situation, please tell me.