Before you try and do it on your own, do you have any other family around that you could stay with?
Let me tell you that the little amount you make is almost nothing when you on your own, even with two or three roommates. Your life would really suck, working hard just to barely get by.
Don't let anyone tell you otherwise. If you are having a real problem, go talk to a friends parent, some clergy person, a relative or someone else you trust.
Please don't think $500. a month is a lot of money.