UC’s and CSU’s give very little merit aid (scholarships). Most of the financial aid awarded by the CSU’s and UC’s are need-based aid so if you are low income, then you would be eligible for federal aid, Cal Grants, Middle Class scholarship program and the Blue and Gold program (if you are a California resident for last 3).
You have excellent SAT and ACT scores which might garner merit aid along with need-based aid from some of the California private schools which could possibly bring down your Cost of attendance into an affordable range.
USC, Occidental, University of San Diego, Stanford, Santa Clara, University of San Francisco, St. Marys College of California to name a few private schools to consider.
UCSD and SDSU do have some merit scholarships you can apply for after you have submitted your applications. Just make sure that if you do not receive any merit aid, that these schools are still affordable.
https://go.sdsu.edu/student_affairs/financialaid/scholarships.aspx
https://students.ucsd.edu/finances/financial-aid/types/scholarships/freshmen/index.html
Each school has a Net Price calculator so I would first use the NPC to check affordability and to get an estimate of your costs.
https://go.sdsu.edu/student_affairs/financialaid/netpricecalculator.aspx
https://students.ucsd.edu/finances/financial-aid/forms/calculator.html
FYI: The UC’s and CSU’s use only 10-11th grades in their GPA calculation while the private schools will use 9-11th plus 1st semester Senior grades in the application review.
https://rogerhub.com/gpa-calculator-uc/
Having No EC’s could hurt you at the UC’s and Private schools since they like to see students to give back to their community and explore outside their world outside academics.
CSU’s like SDSU do not consider EC’s in their application review.