Most of us using Blender want everything to be free, but free doens’t give us the real knowledge to really apply our craft. No matter how much we learn how to rig and move manipulations, you need the background theory of animation to truly understand how to make it look amazing.
Principles of Animation 1 - Squash and Stretch -
Principles of Animation 2 - Anticipation -
Principles of Animation 3 - Staging/Framing -