u/Infinite-Meeting-975

Hello hello fellas I've been learning piano for a little under a year now and learned 4 variations a while back it's variations 1 2 3 and then I jumped to seven I think it was, Ill learn the rest sooner or later but I wanted to see if anyone can find any bad technique or habits I have since I don't have a teacher I'd really appreciate any type of feedback or critique I know there's a few small mistakes in their and I'm rushing a bit in some parts, I wanted to do it in one take, I'm also aware the fingering in the intro could be a bit better since it's the first thing I learned and didn't really have that much experience and it's just imbeded into my muscles now😭 but everything else I feel as if its fine please correct me if you find anything thank you.

Hello everyone. I was practicing Solfeggietto in c minor by CPE bach and I noticed that my hands were curling up so much I end up playing with the small knuckle right below my finger tip it's hard to explain I've attached a video is this a bad thing? And how can I fix it if it is a problem because when I tried to not do it while playing fast my finger tips end up collapsing