Did you receive a grade, and were you given exams? That’s what the UC’s and CSU’s want to see.
As for USC, it’s a very expensive reach. Assume $70-80K. I just listed it because it is a private. The school likes National Merit Scholars and winners, musicians for the Trojan band and National level athletes. They offer significant funding to NM winners. (My son was offered admission but as a URM, he was also an athlete, as well as a National Merit winner. He didn’t want to do sports in college so they only guaranteed him ½ tuition (about $36K for NM) and we would have been responsible for the other half of tuition, as well as his room and board. He got better funding at UCLA and other tops schools, so he declined USC.
If you need funding to attend USC, you need to have a hook to be admitted: URM, recruited athlete, legacy, large donor, celebrity status.