Read this if you are good with advice. - Comments

Well, you're good at drawing, and writing :) who says you aren't artistic, and look on the bright side ( i hate that phrase) you've got a house, you have a computer... If you share your drawings and writing then you will get feedback and good feedback brings confidence .

Message me!

Honestly, by letting this all out your on the first step.
About your friends and cousins: Don't keep it all inside. Tell them how you feel. If they really do care, they'll still be there. About Aunt & Uncle: That's adults for ya. Expect us to do everything and then go and fuck it up.
You should appolagize to your grandmother.
And devinatly avoid the abusive situation as much as possible. It won't be better there.
You've only got yourself to motivate you. You can get past this. One day it'll be just a bad dream.

I know no one else will say this, but sometimes, you've got to force yourself to change so that you can make things better for yourself. Even if you go back, maybe, just maybe, things will be better. You can't count on it, but you can try.

Keep your chin up, and hold your head high.