Although UCs are test blind, your Nat’l Merit award informs them that you test high. Your accomplishments and record are great. Look into whether you’re more likely to get into your other reaches applying with a less competitive major, if the Comp Sci that you really intend to do has a pathway into the major, even if you entered not declared as a Comp Sci major.
I think that you will be able to get into an affordable school close to you, but you might want to consider some other OOS public powerhouses in Comp Sci. I think that UMass Amherst would probably accept you with honors and highest OOS merit award, which would bring your cost down to the low 40’s, if you don’t need health insurance.