Today, one of my best friends helped comment on my drawings. And she said that the proportions for the figures were off, so I re-drew the parts that were out of proportion.

 For the front view, I smoothened out the waist. I also adjusted the knee height for both the front and side views so that the lower half of their legs would be of equal length to the upper half, and I adjusted the butt shape for the back view

 For more practice I just drew random sketches concentrating more on the torso.