Hey man! I'll give you some feedback on those facial features.
Lips. Their volume consists of a fold between two tapering cylinders. Their outline is more of a color/texture change than a plane change. As a result, their outline is often overstated, and you can get away with representing a lot less with solid outlines, and more through careful rendering. Keep doing these from observation, and you'll see you can render these through value shifts alone!
Ears are fine, keep doing observations and using reference, as there's a huge amount of variability in their shape and form.
Good job on the rendering of the eye-mask and the nose. Once again, I know you're lining the different planes around the eye and nose prior to rendering it, but less is more. For example, the edges along the side of the nose are just soft plane changes, so a slight change in value is all you need to show it rather than a solid line.
As you practice these, you'll start seeing things less in terms of line/outline, and more in terms of planes, shape, and value. You've got a good start, keep it up!
