My Fashion Drawings

I wanted to show you some Images of one of my drawings because I would like you to tell me what do you think and also give me some tips etc.
(If you are wondering I want to study the Fashion Designer Career)

                  Ok, so on the first photo there only is a girl with a dress (No shadows, no black contour...)

In this photo I added some shadows, basically on the left (where the bow is) because the light´s supposed

  to come from the other side.

And in the last one I made an outline/contour with a black Felt-tip pen.

(I want you to know that Im not a pro and I probably made mistakes on this drawing, so thats why Im asking for your opinion :)