How can i get a grant when i owe over $3,000 for student loans and want to go back to school
All you can do is apply for financial aid at the school you want to attend. If you are accepted they might even extend the time you get to pay off your current loan.
You probably can't. They won't give you more money if you haven't paid off your first loan.
Unlikely that you can. They will look at past payment history to predict future payment history!