Your sense of body proportion looks pretty good to me! Your sense of composition is as always beautiful and horrific in equal measure.
Zombie about to mess up his 'do!
In fairness I used a posable mannequin to rough out the positions. Proportions are easy as fuck in VR, tho, cos I have a body IRL. So say I'm trying to do an arm and get the shoulder - elbow - wrist right, I can actually hold my left arm the right way and trace over it with my other hand.
Also the zeke head in this one was a repurposed goblin head I did months ago which already had the expression I was shooting for. Just needed to lop off the ears and fuck around with the skin a bit.