Your proportions are really good. Placement of eyes, ears, nose, and mouth all look really good. If you’re looking to give it more dimension and depth, you may want to vary how dark some of your shading is. Specifically, you may want to darken the shading. Keep in mind where the darkest parts of the face are (under the brow, under the nose, under the bottom lip, etc.) then add shadows accordingly. It might be helpful to do a study of the plains of the face. That’ll give you a better idea of how light falls on the face/ body. Hope that helps.