Hello Pandora,

Interesting to see that you are aiming for a more sexier
witch than the original!
Apart from the good ol' help of using a reference, there is at least
some things that I note when viewing this piece.
There should be a width of the eye BETWEEN the eyes. They are
now too close together. Looking at the angle of the shoulders
the breasts should be at the same angle.

For the mouth, hands and anatomy I would still suggest using
references. Check the middle finger on the hand. Also the
hand is really facing forward which is impossible to do with the
arm that is attached to it at the moment.

A suggestion for the hat would be to avoid the zigzagging and
shade as if the hat were a cylinder.
Personally I would make the hat more like the one from Harry
Potter, but the original has this rigid straight form. The
pictures on google - picture search on the original wicked witch
has straight vertical shading on it.

Hope this helps and good luck in keeping her fresh and youg :)

Best regards from

M.E.