/ic/ - Artwork/Critique

first real portraiture study, looking for some headers
im trying to not just copy the face but recognize the landmarks and muscles/fat im familiar with and thus place them accordingly rather than simply eye-guessing, but i can tell I fucked up in a lot of ways. i feel like i wont really be learning anything if i simply copy pictures, so whats the best way to go about it?
sorry about the light lines btw, my pencil strokes reek of no confidence