I have to agree with @Anayan Kashyap . Your shading is beautiful, but the drawing looks a bit stretched. Kinda looks like you were sitting back with a table in front of you and drawing while leaning back into the chair XD (Note: Dont ever do that by the way! Its a pain to fix it when you notice. It just happened to me recently (╥_╥))
Oh, also, after shading, go over the outline with a thin-pointed pencil, it'll look a little more... together...?