Revised! Changed angkles and stomach area.
This is a wonderful start! You’ve got a great foundation here. It’s a bit tough to tell for sure from the photos, but it looks like the arms might be angling back a little—adjusting proportions all around just a touch will really bring it all together!
Drawing a man using the following equivalences for each part of the human body:
Body = 7 to 8 x head.
Leg = 4 x head.
Arm = 3.5 x head.
Trunk = 3 x head.
Shoulders = 2 x head.
Hand = 1 x head (or a little less).
Neck = 1 x hand.
Foot = 1 x forearm = ½ arm.