The money for your Pell Grant is sent directly to the school, where they will use it to pay what you owe for tuition and fees. Once you've satisfied your account balance, any remaining funds will be passed on to you, for your use in paying for other educational expenses.
Your aid eligibility is determined by two primary factors - your EFC score and your school's Cost of Attendance. No matter how extreme your financial circumstances, you can not receive aid that exceeds the total amount of your Cost of Attendance.
Every school has its own Cost of Attendance figure - it's an estimate of what it will cost the average student to pay for tuition, fees, books, room and board, school supplies, and things like gas money to commute to school. Your school starts with that estimate, and begins subtracting money that is available to you - either your own money or financial aid money. As money gets subtracted, your "need" goes down - and when the school considers whether you qualify for more money, they look, first, to see how much "need" you have remaining.
If your EFC score was zero - you are eligible for a Pell grant award of up to $5350. You would receive the entire $5350 if you register as a full-time student in both the Fall and Spring semesters AND if you have at least $5350 in remaining financial aid need.
No matter what your Pell award might eventually be, the money will go, first, to your school, and then, any remaining funds will be forwarded to you.
I hope that helps - good luck!