OP, assuming you’re Nigerian, I would encourage you to add to your list:
Vanderbilt (they definitely look for URMs)
UT Dallas-apply for the McDermott Scholarship, which is a full ride + scholarship
University of Pittsburgh-Not sure how their scholarships are looking these days, but they offer full tuition+
WUSTL-they have merit scholarships
Do either of your parents work for a company that offers scholarships to its employee’s children? Check that out.
Apply for the “big” scholarships found on this forum. Look for ones that don’t take income into consideration.