Advice for an aspiring musician

Hi, I’m 15 and for the past year I’ve been recording and writing songs on GarageBand (yeah I know). I found it was a nice to be able to grab my phone when I was bored and write something that I wanted to hear.

I decided to make a SoundCloud to keep all my tracks in one place. My dad got my brother and I a ableton live mixing board. And I think ableton gives you even more freedom.

I’ve made the decision that this is something I really want to pursue. I was wondering what advice seasoned musicians could advise me to do. Do I get a degree in uni? What software do I use? I play drums and sax, what are some other instruments I should look in to learning?

Thanks in advance to answerers