Also, living with your grandmother will not make you a California resident, although you may get a break on rent.
As an OOS resident, you won’t get a break on tuition for the UC’s. Living with Grandma makes you even less eligible for instate tuition.
You will be full fees at both the CCC’s and the UC’s/CSU’s.
@NCalRent has mentioned the WUE schools which you may want to consider since you seem desperate to come back to California.