" If you moved to California primarily to attend the University of California, you are here for educational purposes and may not be eligible for a resident classification for purposes of tuition."
Moving to attend a comm college would not start the residency clock. Even if you later were admitted as a transfer to a UC or CSU, you’d be categorized as OOS.
You noted CSUs. The links in #1 and 2 are from ucop (UC Office of the President.) Generally, these are definitive, over-arching. I don’t remember any twist or special exceptions for CSUs. You’d have to find that. But CA is not in a position to underwrite lots of OOS students who come for college (for “educational purposes” only) and want discounts. You’d need to establish pure residency first.