I looked for a younger reference that could better fit his age (I was going for around 19-20). So, I superimposed it on him and I noticed he was a little tilted to the left.
Lesson learned: use references and proper construction
before you finish the drawing. Here's the superimposed image after some editing though:
That's where I think his shoulders would be under a rather thick coat. Also, his face looks to be just the right width (I think?), but extends too far down. I think I'll try to fix that soon. Here's the current ver:
I guess I'll get the proportions right before I start worrying about details like the fur on his coat.