Hey duck_king. One of the important thing to consider when drawing the head is the structure of the human skull:
1: The height and depth of the skull are about the same size.
2: The eyes are halfway down the head.
3: The widest part of the skull is the cheekbones.
4: The wider the cheekbones are, the more of an oval shape the skull will have.
5: The width of the skull is roughly two thirds of the height.
6: The skull is divided into threes. The below sketch illustrates (the black lines represent the three divisions while the red line represents th halfway point) .
don't worry about the life drawing class. There are some greate books for drawing the human figure and head.
These are the ones I recomend:
FIGURE DRAWING FOR ALL IT'S WORTH by Andrew Loomis.
DRAWING THW HEAD AND HANDS by Andrew Loomis.
The Artist's Complete Guide to FACIAL EXPRESSION by Gary Faigin.
You may also want to try DRAWING ON THE RIGHT SIDE OF THE BRAIN
A Course in Enhancing Creativity and Artistic Confidence by Betty Edwards.
I think there are some tutorials here as well that could help you out.
I hope this helps you
"It 10% how you draw and 90% what you draw"-Andrew Loomis