If I got a 4.0 in Santa Monica Community College how likely is admission

I do like both thornton and science, and thornton seems like a dream, but, idk how good of an idea it is, majoring in music, I’m kind of conflicted on if it’s worth it, I know I can do a very good audition for thornton, and I know that could help, but still, majoring in music, I don’t know if I could transfer out of thornton to dornsife at all, or even if I’d want to do that since that’s kind of crummy, and majoring in science does sound like a better outcome post grad, which is why I want to go to smc, and transfer to usc dornsife, even tho I feel very confident in a thornton audition