im srry but i got to say,low med begginer,you have to watch the stiffness try moving everyjoint in each frame
also you got to work on your easing, such as this
-\--\---\-----\---\--\-
no easing
that tells how much of a joint you should move example of easing
such as in one frame you only move it 1 little time
on the next frame you move it 2 little spaces
on the next you move it the spaces
on te next frame move the joint 1 Big time
then back down the scale