Right you wanted helpful comments, ok; 1st His arms, take note of just were on your body that your elbows reach when you bend them? They usually reach very near the waist, just depending on if you are male or female. When your arms are bent you can touch your shoulders. Now you should be able to correct the figures arms.

If you are having trouble with the face here is more help. You have started of ok, now is he looking up or down? If up the line you have drawn is correct, if looking down draw it looping down instead of up. this first line halves the head, the next line for the base of the nose is about half again of the lower half. Now draw another line for the mouth halfway between the nose line and the chin. Is this the help that you were hoping for?????????