You can go to university and get trained to make art.
Except thats not actually really what happens when you take an arts course.
Like, composition, which I took for three years was more music appreciation plus discussions about what we were writing at the time. It wasnt so much that I didnt learn anything, but more that I wasnt taught anything. We just discussed composition a lot..
But yeah, it definitely makes a difference what you take. Just to repeat what I have said a lot: Dont do management, marketing or philosophy papers. Then you really wont learn anything.
If composition doesnt include things like species counterpoint or whatever (which in my course was a separate paper called techniques and technologies or something), then it isnt really going to teach you a lot, though it is always nice to get other viewpoints on what you write, you just dont need to go to university for that.
Have a nice day.