I don't really understand the instructions or I just don't know where they are. I am using the Bottom 1x2 Eyes and I do not know how to animate them is there a visual tutorial somewhere or am I just dumb.

they haven't got the eyes working yet on 1.21, so its only the player animations for now.

if not, then this is the best thing I could find:
https://youtu.be/uDccyv7FROs

Actually, 3.0.1 with eyes works completely fine in 1.21