I have way more interest in history and philosophy but the way I figured is I can learn all of that on my own because all you need is to read. Math is actually hard so I better get "trained by someone" at it.
Speaking for myself I have in the last five years or so been learning I have much more of a capacity for making art than I had thought. My art is nothing special, but I am improving every time I practice. But when I was younger I thought that I was just good at STEM-yy things and bad at other things. Relatively speaking I am better at STEM-yy than art-yy things, and I'm probably worse at art-yy things than most other people. But I have huge room for growth and I think I will eventually produce some beautiful watercolors.
As an aside, I've also found that almost everyone thinks they're bad at math? My friends with PhDs don't think they're good at math but they've forgotten more than I know about it. I think I'm bad at math but I can prove a thing or two. My spouse thinks they're bad at math, and they can't do the things I can do. But a few months ago they needed to do some simple algebra at work, and a coworker said, "dang, I wish I was good at math."
Somewhere out there Terence Tao is saying he's alright at math but he has nothing on that Euler fellow.
There was one person, though, that I just could not get anywhere with. Even after several private lessons. Turned out that somehow she convinced herself that she will never get it and never be able to progress. Even if she did get it right one week, the next week was as if that never happened. I found no way across that barrier :(
It is what differentiates stem fields fron liberal arts, in my biased view. You are either talented at maths, physics, chemistry or you just grind, study with thr books snd exercises, until you know enough to pass the exams.
Coming from gymnasium/high schoolit is very different. There the teachers tell you what to do, at uni you have to figure out yourself how you need to study to get the results.
US universities have been known in Europe for being a childs play, if you were any good at all in stem fields