Here's two ideas for you to play with - the first one, just draw to copy it; the second one, get a photo of yourself and enlarge it to at least 8x10, and then cover one half of the photo with plain white paper, and then try to draw the opposite side of the face - the examples are below. The first one has guideline in it to show you the proportions and layout of the face and facial features. And in case you are wondering why to do this, it will help you see more clearly how the face appears and is drawn, and will give you good experience. I do suggest a class, it's the best way to learn.The examples are probably at the link above or definitely this one.
Every Frame a Painting is a tumblr of excerpts from movies explaining what makes them great. I am not sure if the above link will show what I want it to, which is a dissection of a scene from Silence of the Lambs - I don't see individual post links. Anyway, interesting stuff even for movie watchers, much less for makers.