This past January I started learning to snowboard, and on my 3rd day I broke my arm. It's still recovering so I'm skipping this year and planning for next season.

I've had shit teacher that didn't teach me much, I watched youtube videos but putting that shit in practice wasn't easy and teacher let me go up the mountain alone and guess it was icy or something because I smashed my arm real good from simple fall.
My main problem was stopping, I start going down fast, I could only do a fast stop, turn hard and usually fall, that's how I fell and shattered my humerus, wasn't going too fast but still, could swear I had my arms against my body but maybe the angle was against me.
Anyhow yeah, I didn't get good enough for basics and that mountain didn't have much areas to learn that weren't too steep so I'd just go fast, try to turn to break but nope I'd just continue going fast to the side or crash into snow on side or trees which I avoided by falling a lot.
Next year for sure I'm getting a lot of classes but I still don't get it what I was doing wrong, I watch all these videos and it seems so simple. I'd just go on my heel edge, start turning but instead of slowing down I'd just keep going to the side or hell stop and then start going switch which I for sure didn't know how to do. The area was kinda narrow too so I didn't have ton of space to maneuver sigh, guess a lot of shit was stacked against me there...