California UC’s are need-blind so they do not consider an applicant’s ability to pay in their admission decisions, so being full pay is not advantage if you cannot meet the minimum UC GPA requirement.
Below are the UC Admit rates for 2019 International applicants. For the UC’s campuses, the admit rate is higher than overall average due to a low yield/matriculation rate but also the academic standards are usually higher.
Admission Rates for International Applicants:
UCLA: 8.49%
UC Berkeley: 9.16%
UC San Diego: 29.7%
UC Santa Barbara: 34.6%
UC Irvine: 40.5%
UC Davis: 42.1%
UC Merced: 50.3%
UC Riverside: 69.5%
UC Santa Cruz: 74.5%
Again posting admit rates based on UC GPA:
2019 Freshman admit rates for UC GPA of 3.00-3.39 capped weighted and not major specific:
UCB: 1%
UCLA: 1%
UCSD: 1%
UCSB: 1%
UCI: 1%
UCD: 2%
UCSC: 13%
UCR: 18%
UCM: 53%
2019 Freshman admit rates for UC GPA of 3.40-3.79 capped weighted and not major specific:
UCB: 1%
UCLA: 2%
UCSD: 9%
UCSB: 6%
UCI: 7%
UCD: 9%
UCSC: 40%
UCR: 53%
UCM: 80%
Just giving you a perspective. You have gotten good advice in the above posts and being full pay is an advantage for many schools.