Don't trust those people they are not your friends. They are the kind of people who will cut off your legs and then ask why you can't run.
Don't trust your family they are not here to help you. They will blame you for things that are outside of your control.
Your mum is a sadistic crazy cow, don't expect anything from her except disappointment.
Drop out of school at year 10, don't bother going all the way to year 12. It is a waste of time. Also if you stay in school it will greatly contribute to your mental health problems.
Also things will get better and you are much stronger and smarter then you realise. Someday you will realise that the people who gave you such a hard time growing up, aren't as good as they think they are. For now though, just keep going. No matter how hard it gets.