Bynine nailed it. From studying skulls, you'll see that the nose starts at the browline. The nose is the nasal bone + cartilage and it's just a wedge that's connected straight to the skull by the brow.
The eyeball is then nestled inside the socket which gives us a step back from the profile line to the eye, and we see it from the side as it is covered by the eyelids, so they close like a hatch.
Remember that the bottom lid doesn't really move that much, so the lower lid is mostly static and the upper lid covers most of the eye.
Imagine a watermelon with a slice cut out of it. Then plop a wedge in there by the keystone.
I'm also mentioning the neck behind the ear because it helps me organize the masses. If I base my neck off the back of the ear and down, I know where I can slim it down (the other side). But I won't be breaking the anatomy that much.
Sorry about the rushed drawings. I knocked this out before work this morning and wasn't sure if I should try to help or not. I'm usually not very good at explaining without getting some key things wrong, and I know I've insulted people in the past by commenting.
In my example I didn't follow your guidelines for the turnaround completely, but you can probably figure something out. I've seen your sketchbook, you're very competent so it's just a matter of applying yourself with some knowledge.
Stylizing something means exaggerating different features, but it quickly becomes uncanny if we skip the anatomy completely. Do some more sketches and see if you can't figure it out. I haven't gone far with stylizing things here, because I usually don't and I'm still working to get better at drawing in general before I tackle the really difficult stuff
. But I hope the little things I did while keeping with anatomy still helps you.