music and some school struggles

I just started playing drums recently and taking lessons for that and guitar. Drums are literally so much fun and its nice to try other instruments outside of guitars and vocals.

Piano is surprisingly a new one too, except I'm not taking lessons for it. In my film class my group had to do a project and I was in charge of the music part so I somehow learned how to play piano in seconds and became fuckin what's his name, Beethoven? Mozart? shit idk I'm into rock and 80's  I don't pay attention to the classical music composers. Anywho I'm really good at it and I made somewhat a new song on there just for fun (like aside from my film project). At the moment I am just adjusting the song and trying to put together a masterpiece of some sort I guess. The piano feels so free for some reason. like every instrument does for me at some point like freedom to play whatever the fuck you want and It feels so beautiful to create your own songs.

Another thing is how shitty school has been. I have a ton of stress weighing onto me and its just because of stupid chemistry. My best friend however just transfered to my high school (he used to go to the other one nearby) but I am beyond happy. I think I am just afraid of failing and not doing well in the future. I've been so sad lately I just have no motivation to do anything anymore and I am not sure why. I have just been really depressed and sad. Maybe its my past or things that I constantly think about that I should not be worrying about. My stress and problems all come from school but I do NOT want to drop out. there is no way. my dad has seen how much I have been struggling and asked me about it but I said no. The reason I stay in school is because I want to be proud of myself for once and know that I graduated high school and went to prom. I also enjoy my friends company very much and love seeing them every day, but it's just hard at times.

I don't know guys, what usually helps you when you don't have motivation for things like school or just everyday life? what would you guys suggest cause I really don't know what to do.