What can I do with my musical ability?

Skip the details in this paragraph if you want. I play drums, piano, guitar, and I'm about to start playing cello. I also know a lot of music theory. I'm more of a jack of all trades with my skills since I don't focus on just one instrument, but I'm very passionate about music and I try to improve in all of my instruments as best as I can. I'm not classically trained in any of them and I can't read and play piano music SUPER quickly (working on that). I started all of this music madness about two years ago, however, and I'm already 18, so it'll be hard for me to truly catch up to be good enough to perform in a top orchestra or anything like that. I occasionally write songs and record videos playing and singing, but don't post them because I can't sing.

My question is essentially: is there any point in doing all of this? Besides just having a cool hobby I enjoy? I LOVE music, but I want to be a doctor (probably. Struggling with deciding between being a doctor and focusing on something involving one of my creative skills). It's not satisfying enough to me nor does it feel productive to just have my music as a hobby. Any suggestions about what I could do with it?? If it's at all relevant, I want to live in New York or LA eventually. Almost did for college, but didn't due to financial issues.

Thanks!