Nice choice for color. Tight, with a unity which helps it along well.
The head has some minor placement problems. The eyes, nose, and mouth are well distributed, but start very high on the head. In the future, I suggest taking a look at a model (pic from a magazine) to get the head proportions correct.
The foreshortening on the foot helps, but try to avoid these dark microns for contour lines. Establish your borders with a good 2H pencil beforehand. The pen marks make him look vaguely cartoony, and your color fights against that. Value is your friend.
*shutting up now...*
That's great for a first attempt. Try varying the width of your ink strokes for more definitive outer edges.