Nice work! However the mouth on the right side seems a little off. Needs a slight upward curve to it. The one in your first drawing with color seems about right. To me this stands out as the eye is drawn to this area as the center of attention. My opinion.
Maybe daub it with Plasticine (an oil-based modeling clay). It will leave a slightly greasy surface & will knock back reflection. Also, you can make a pounce bag filled with baby powder and it will smooth out the greasy surface with a matte white one.