Hey guys, I'm new here and new with Pixel Art as well.

I've been drawing some stuff for some time and always wanted to study a little bit better the animation field.
So last weekend I tried to make a really really simple Mario-style character just to exercise some animation principles like squash and stretch.

I fiddled with it but still can't figure out why the jump seems a bit weird. Do you have any tips?
Also, any recommendation on how to study animation? Some simple exercises maybe?

Animation


Spritesheet


Thanks in advance!