For the majority of the UC’s, OOS applicants have a higher acceptance rate due to a lower yield. OOS applicants get little to no financial aid, so $65K/year can be cost prohibitive for most applicants. Also OOS applicants require higher stats are in general than in-state applicants.
UCLA for example had a 11.8% acceptance rate for in-state applicants this year but for OOS it was 16.5%.
So what are your UC capped weighted and Fully weighted GPA’s?
https://rogerhub.com/gpa-calculator-uc/
SAT/ACT scores? Intended major? EC’s?
The majority of FA given by the UC’s is need-based for in-state applicants. There are some merit scholarships but are highly competitive with no guaranteed merit. I would run the Net Price Calculator to get an estimate of your costs.