And also, you want to establish your instate domicile and intent to stay there separate from attending college.
I would suggest you discuss this with someone at the college. Get the info you need to petition for a change to instate status. Once you have that, you will know what the requirements actually are…and if you have the potential to meet them.
And going by the first post…the OP wondered if marrying an international student would help her gain instate status. The quick answer to that is not likely, since her spouse is also not a resident of CA. Might this get her independence for financial aid purposes…yes, it MIGHT…not will, maybe it will. But there is no guarantee that she will get one penny more aid from UCD, which doesn’t meet full need for all, and provides most need based aid via the Calgrant (since she is OOS, she is likely not eligible for that either).