Re your choice of UCLA: Were these courses taken at your school? The VPA requirement is very strict for UC schools. It requires a syllabus with a yearlong study and grades provided by the instructor. Given that you play 3 instruments, were you registered in a course in high school? Orchestra, band with grades?
“One year of college-preparatory visual & performing arts required, chosen from one of the following disciplines: dance, music, theater, visual arts (e.g., painting, web/graphic design, film/video, inter/multimedia arts), or interdisciplinary arts.
For information on how a student can fulfill UC A-G admissions requirements, please visit the UC Admissions website.” Subject Area F: Visual & Performing Arts