I'm a self taught pianist . I know my fingers and wrist are wrong and currently I'm trying to correct my wrist. I have been learning to play "senbonzakura"

I have only been playing piano for a few months (about 6-7 months and about half of it I was learning seriously).

Something isn't right when i play the song. And Its probably my finger evenness or that my digital piano's lower keys are super loud. I heard that I should play with the weight of my hand but that still doesn't help.

This is with the default touch response
https://youtu.be/NRlUuyBT09o

And this is touch response off https://youtu.be/29ZuofkpGaE

(I didn't cut my fingernail because it hurts to cut so short)

I want to play as well as this guy https://youtu.be/LxkEr-3GCGU he has over 20 years of experience.