CSS help? maybbeeeee? PLEASE ACTUALLY

cough cough excuse the title. I am perfectly fine. :smiling_face_with_3_hearts: (no I'm not)
ANYWAYS
ANYGAYSSS
I need some help with CSS! If you wanna know how I coded some things myself reach out to me!
But still, I need help, if anyone knows how to change things like the comment color, shake pfp's, add images or falling items then reach out to me please! THank you! have a poggers day!

WeEEEWoOOOoOOOOO