I don’t think it’s too late at all! I am a newbie to the music world, but I can say that my son starting looking at music majors/schools in early fall of senior year, and he’s applied and been accepted to several. His interests are not the same as yours (he is heavily performance based), but I’m giving his story because it just shows you are not too late.
I don’t know what you consider a good school, and that is a huge discussion to dive into! But I will tell you about two that my son is considering for performance, but which also have degrees that might interest you.
The Loyola New Orleans Music Industry Studies program can be a major or minor, and it exists within a broader university where you can study many other subjects. You might be able to work with an advisor to create a mix of courses. NON-music-majors can get modest scholarships for playing in ensembles.
University of Colorado Denver has a non-audition track music business and recording arts BS. That school is a College of Arts & Media, so there are not opportunities to also take, say, Philosophy or English courses. Being a city campus and an arts based program, it is a very specific environment you would need to look into. We have not visited yet.