Rolan86, I've had a similar path as you. I am a musician too, and when I went to university as a music major I was so sure that it was my passion etc. The next semester I switched majors due to the loneliness and the competition. My parents didn't allow me to drop out altogether, so I chose anything that I could-psychology. It went pretty bad, I was just coasting. Then I became a hairdresser, another passion of mine. Anyways my point is, lots of people take time to find their passion or dream career. It takes time. Even your peers may seem so sure right now, but I'm sure a few will change careers at least once.
You are young-you do have the time to figure out what you like and what you don't. It is never too late to learn, it is usually just the fear that holds people back.
Also, a lot of my uncertainty about my path in life was mostly due to depression and anxiety. I hope that you have access to a counsellor at your school to help guide you.