What are my chances of getting into these UC's? How can I improve them?

Hello, I am a high school student who just finished his junior year

School Rank: Within top 15%
Unweighted GPA: 3.73
Weighted GPA: 4.03 (3.95 if freshman grades are included)
UC/CSU GPA: 3.96

SAT I: 560 (Critical Reading), 690 (Math), 610 (Writing)
SAT Subject Math Level 2: Have not received score yet but hoping for a 700
.
Extracurriculars:
-School swim team for all 4 years
-California Scholarship Federation for all 4 years
-National Honors Society in junior and senior years
-Co-leader of chess club since sophomore year
-Co-leader of guitar club since junior year
-Volunteer at a veterans’ clinic
-I have over 100 hours of volunteering and community service

Honors/AP Courses:
-Sophomore year: Honors Chemistry (only Honors course in our school, by the way) and AP European History
-Junior year: AP English Language, AP US History, and AP Calculus AB
-Senior year: Planning to take AP English Literature, AP Computer Science, and AP Calculus BC

My desired major: currently debating between Computer Engineering and Mathematics

Colleges I want to apply to:
UC Davis
UC Santa Cruz
UC Santa Barabara
UC Irvine
UC San Diego
CSU Long Beach
CSU Fullerton
San Jose State
San Diego State
Cal Poly SLO

UCSD: Reach
SLO/UCSB/UCD: Low Reach
UCI: High Match
SDSU/SJSU/UCSC: Match
CSUF: Low Match

Bump up your SAT to at least 2000+, you chances would be much better for Computer Engineering. If you go for Mathematics, your Reaches could become Matches especiallly with well written essays and your EC’s.

Good Luck.