/ic/ - Artwork/Critique

I've been drawing for a while, taking art classes at my college and everything, but it still just feels so overwhelming. I don't even know where to start for practicing on my own time outside of class.

Like for example, I want to get better at drawing faces and heads. Do I just study by drawing photos of people like a life drawing? Do I try learning head construction? Both at the same time? Drawing from imagination? When do I start learning more about the rest of the body and everything else?

I just feel so overwhelmed at times guys.