Sweet start! His pants seem to be selectively tight however. I think you've either got to bite the bullet and detail his package a bit more, or (what I think would make a stronger comp anyways) pixel a baggier pant. The way his head is situated seems out of character against the rest of his pose, its a dejection/shame head posture against a more combative, proud body pose, feels out of place to me. His hoodie strings look too dark and distracting to me.
That said, this is a really nice start, the colors and sense of volume are great so far!