Just follow these easy steps and you will be able to draw a face in no-time.
Draw a rectangle that is slightly higher than wide and lines as the picture.
Add lines as in next picture.
Keep adding new lines as in picture. The ear is attatched in the same height as the eye.
Start adding features like nose and smooth all the lines of the head to look more life like.
Remove all guidelines and add details like nostril and eyebrow.
If you do this a couple of times you will be skilled enough to skip guidelines and just freestyle drawing heads. After that you might want to experiment with shadows.
Also... dont be bothered if your head dont turn out to look like mine. People dont look the same anyway. Here's some examples I did. That's it. Bye!