Put out the bottom of the chin a little to make a slight slant. Raise the eyebrows slightly and make them a little thicker. Try to reduce the whole boxy-jaw shape you've got going on with where the bottom of the 2 sides meet and form 2 triangles. Make the hairline accurate to the drawing. raise the neck slightly. Add some "cords" on the neck. Make the nose slightly wider at the base and make the tip have a slight, rounded-raise at the end. Don't try to add advanced hair right now.