Find out whether you’ll need to meet a specific minimum test score to get into certain schools: https://www.collegeconfidential.com/articles/colleges-minimum-sat-act-score/
Look up data from past admissions. That will give you the range of scores of accepted students. You can also look.at admissions requirements. If your test scores are very low as are your grades, find an open admissions school or a community college that you can use to bring up your grades. States have articulation agreements that allows students to earn a particular number of credits and gpa to transfer directly into a state college. Beware!!! While you can earn good grades in PE or some other area you enjoy or do well, remember your grades are expected to demonstrate you can succeed academically at a state university. If you do well in what is fun and easy, you will be admitted and flunk out pretty quickly.