[Help] Can't shoot consistently :/

I've been so frustrated recently because one day I'll be shooting the lights out then the next 3 days I can't even shoot. I practice quite a bit (200+ shots every 2 days, it's been 2 months since I've started) and I think my form's fine but my friends say my arm goes way too high when I release so maybe that's causing the inconsistencies.

I don't know why I'm posting this I don't think you guys could really help me because the only tip I can think of is to simply practice. I guess I'm just letting it out of my chest because I've been pretty pissed off whenever I miss 2 in a row in games and I feel like I'm hogging the ball even though I'm open and shoot.

Buuuuut if anyone has any 1 man shooting drills (without any other special equipment, just a ball and a hoop) that would be great thanks.