In life drawing, there are really only a few options for drawing the human form as it is, live.
1. A life drawing / figure drawing class
2. A large mirror
3. A public place (cafe, park, museum, transit, etc.)
4. Your family or friends, if they can stand it
So sometimes you have to cheat. You have to snap pictures where you can. I recently took like a million reference images of my face and hands, with many different expressions, since we largely communicate complex emotions through facial expressions and hand gestures combined. Here below, I've taken two hours to practice drawing my own hand and face.