I really like the stance and viewpoint. The hand positions appear to be well-formed.
There are two glaring problems here. The first is the shading of the green areas. You only used to tones of green, and that's fine, but if you're only going to use two tones, you should probably consider using your lighter tone more often. As it is, his legs look a bit flat because of this. ]
The second is a perspective problem. This image is 3/4 overhead (I think. I can never remember the names of these things), so things on the ground should appear smaller than things a yard and a half in the air. His right boot, and the rest of his lower right leg, seems to be disproportionately large compared to his hands. 1 pixel smaller in both dimensions would probably suffice.
The lineart here is very well executed. Your cousins and immediate relatives ought to be proud of you. should be proud of you.