i don't normally do this kind of thing, in some ways i just made it really messy, but i altered some things so you could see what i noticed.

firs thing that stood out to me was the head didn't seem attached to the spine, it was too far to the left. i moved it just a bit so you could see where i think it would look more natural.

second thing i noticed was his hands seemed too small, way too small in comparison to his head. the hand holding the sword could be slightly small to make it look like it is back behind him, but i still increased the size of both his hands by a bit.

keep up the good work!