Sounds like your parents have had a rough patch with steady income of dad - if that is behind him, perhaps they can say how much they can contribute to college expenses. Perhaps they have set aside some money for college.
There is a very tight limit of what a student can take out with loans, F/S/Jr/Sr years. Parents may not be willing/able to sign parent loans (government or private).
Are your SAT scores better than ACT? Have you taken ACT?
It sounds like your SAT CR + M score is 1450, which would put you at ACT 32 and close to 33 if that was single score test result.
Someone very versed in CA school possibly could assist in sorting out those college opportunities. Are there any CA schools within commuting distance? Exploring all the sources of specific aid/grants specific to CA residents.
Exploring WUE and follow up with those on this thread that are knowledgeable by PM.
Weighted or un-weighted GPA of 3.5 or better (shown on school transcript) and ACT equiv of 32 or better, you would have full tuition scholarship at UA and other schools in AL - I see up-thread that you are aware of the UA Presidential Scholarship for your stats.
Concern about sister wanting Mills College - and affordability. Avg scores CR & M (which don’t have your sister’s score) 1040-1250 posted in most recent data; the year before avg GPA was 3.6 (they didn’t list avg GPA in US News info, but I imagine it can be found). Tuition $42,900 and R/B $12,900. And if they don’t promise to meet need.
As mom2 has said, a school has to be affordable to be considered a safety.
Need to sort this out very soon to get applications in to the schools where you will have the lowest cost to attend and highest possibility of being able to complete degree. Looking at your desired field of study, public health, you may want to view schools like UAB, although IMHO you may find a broader group of high stat kids with the honors college at UA and look at studying there. Birmingham is a fine medical center. I have students at both UA and UAB - the UAB student is in nursing (ranked #13 for its nursing program).
UA and UAB are very easy on-line applications and scholarship applications.
If you think you might have an interest in nursing, there is a UAB nursing scholars program for HS seniors that apply before a date - and writing a short essay. DD was in that program - if grades are good fr/so, have a seat in junior clinicals and can finish on time.
My kids did receive some info on scholarship opportunity in FL for some of the newer public schools (offering in-state tuition) but I don’t think those are worth exploring in your situation.
Later you can narrow things down. However schools that do not meet the financial limits of affordability; you need to use your resources (time and application expenses) to focus on the best options in your situation.