What colleges/types of colleges are you interested in? Beyond major, what size school, vibe, geography, setting, etc. do you prefer?
Do you identify as male? And because you said ‘maths’…are you an international student (even though you live in CA)?
Does the 3.5uw GPA include core courses only (it should)?
Calculate your 3 UC GPAs here: GPA Calculator for the University of California – RogerHub
Will your family qualify for need based aid? What is your annual college budget/do you have budget constraints?