UCs do not care whatsoever about HS stats. Your HS GPA, SAT, etc. are irrelevant. AP scores can help you get subject credit, but it won’t reflect favorably upon you for having it.
You need 60 semester units / 90 quarter units to be eligible to transfer to a UC. I’m not at all familiar with what Stanford requires, but hardly anyone gets admitted - you’d have to be a unicorn, essentially. You need to complete the UC 7-course pattern (differs between schools) of general education to be eligible. (http://admission.universityofcalifornia.edu/glossary/seven-course%20pattern.html)
CS is incredibly impacted, and there are tons of major requirements that you will have to complete to be eligible for transfer. Go on assist.org, and look at articulation agreements between California Community Colleges and each of the UCs you listed, just for reference.
It’ll be next to impossible to transfer to UCB, UCLA, and UCSD as an OOS applicant, unless you have a 4.0 and complete all requirements available to you. Even then, it’s not guaranteed.
If you have your heart set on a top UC school, perhaps it would be a good idea to look into CA CCs - Santa Barbara City College is a well-known one, for instance, with a thriving social scene that would feel more like a university than a CC. Santa Monica College is also well-known. Both are regarded as top CCs in the country. De Anza is a good CC for CS, as is Diablo Valley College. I’m guessing you won’t be open to it, but it’s a good option that many people overlook - it boosts one’s chances to get into a top UC (as classes are generally easier than 4-year universities, which results in people generally having higher GPAs if they work hard - and CCC students get top priority), and it saves a lot of money.