I’ll let @Gumbymom give you the stats for admission with a 3.82 capped UC GPA.
The UCs do not look at your SAT or LOR. That means that your Personal Insight Questions need to be more than “OK.” Make sure they tell the reader who you are, where you came from, what inspired you, how you impacted others, what you’ve learned, etc. Start working on them now. Write, get feedback, re-write, repeat as many times as it takes so that they much more than “OK.”
The Activity & Awards section has room to list 20 extracurricular activities. This can include additional coursework, volunteer work & community service, employment or other activities that you participated in outside of the classroom. Each listing has room for applicants to go into detail about the organization and what they did. Make sure you tell what you did, not just describe the organization. Sell yourself. You listed four above. What else do you do when you are not in school? Try to fill at least 15 of the spaces for A&A.