Practicing hands. Probably the animators who do the best hands are: Tex Avery, Preston Blair, Bob Clampett. Good to study their style.
I practiced a sheet of hands here.
Construct the hand by:
– drawing the palms and then the finger mass. You should get something that looks like a mitten.
– draw in the two middle fingers.
– add the little finger. Usually in some variating angle from the other fingers to give it a natural feel. Also, remember to accent the base of the thumb!