If I get Bs and Cs in high school, am I still going to be able to get into a decent college?

I am a sophomore in high school and am a bit worried about college. I want to major in Music Education and music, therefore, is my strongpoint. (When I say “strongpoint” I mean that I’m in just about every musical thing my school offers, and I’m good at it.) However, my grades are only Bs and Cs and sometimes As. I would just like to know if I could still get into a good college, like maybe Berklee (Boston). And if not, if it is too late to improve. Thanks!