LOL, got bored and carried away.
Highly suggest p115 onwards on Drawing Head & Hands by Loomis.
Took a lot of info on p119 in how certain angular relationships can make humans look younger.
A lot of things to consider from brows, jawlines, cheek fat, nose size, mouth size, outer eye to outer mouth triangular ratio, etc.
Hopefully, these help rather than wastes your time.
Two Versions:
Gaunt cheeks, angular nose, sharper jawline.
Vs
Round cheeks, bigger ears, shallow nose bridge.
