I think the face perspective is the main issue, cuz the features dont really match the angle of the head and it makes it look a bit flat. The far eye also looks a bit too big for the angle. The jaw shape is a little off , and the neck looks kinda disconnected from the shoulders. The scarf thing also looks a bit stiff, mostly cuz the folds dont really show how the fabric wraps around the neck. Some of the clothes folds look random too, they should follow the shape of the body. Lastly hair makes it a bit hard to understand the shape of the head underneath, u could try firstly drawing the skull - thne hair | Artwod Feedback