So I used an app call Ibis Paint X for these

I think the side of the face is a little too round and the hair is too puffed up. And the ear and nose are not done that well for this one

As for this, the color of the lip is too bright. And because I used a symmetrical ruler, it looks a little weird.

This is the most recent one and I think that the hair covers too much of the face the outside of the right side is too straight. And the forehead is too small.