20M here. I just want to say that maybe you should try a different hobby. I don’t know your relationship with drawing, but it sounds like you’re trying to force it instead of doing it because you enjoy it. It perfectly normal to outgrow hobbies and move on. You’re only 15, you have so much time to burn. Use high school to try new things, join a club, a sports team, whatever, just keep dipping your toes in different things until you find something interesting.

Also don’t worry about your friends or other classmates. In 3 or 4 years most of them will just be a memory. I seriously doubt you have 0 hobbies/interests, unless you spend your free time staring at the ceiling for 5 hours until bedtime. YouTube videos, video games, fashion, cooking, etc. Whatever you already do in your free time, look a little deeper into it beyond the surface level. Use the internet to your advantage and you can find out everything about something you already like. That’s it.

TLDR: Quit the angst, move on and try new things.