Inspiration

Nice shading, but you could try to not smudge as much so the shadows are more defined. The porportions are mostly ok but the torso seems a bit elongated, usually the male figure has a torso of around 2.5 heads. Keep up the good work :)

The mouth area looks like it isn't in the same view as the rest of the head. It seems like the lips dont lead naturally to the nose. I think the top of the skull looks too small.

You have a pretty good eye. It just needs practice :p But there seems to be a problem with the tools your using... (I know, you shouldn't focus on that to much but i think it could improve your drawing a lot) You're drawing on paper with quite a lot of grain with a pencil too precise. Try to experiment with different mediums, find something you like that doesn't ask for that much precision. It's a not a good thing to focus on details while learning the fundaments of figure.

And maybe also try with a shorter pose time, and i mean really short (like 5 min poses maximum) It is scary, i know, and most of your drawing is going to look like s**t but you'll learn so much more, so much faster.

Keep us updated, i want to see the rest of that ;)

Very nice figure. The only thing I would suggest: The head has a skull, a rounded object. A while back I attended a portrait class. People would do the face & the rest they would flatten. The spacing of the body looks fine. Keep practicing.