wow, man wow.. What a fantastic line drawing youve got yourself here. You'd make a great concept artist. Even though you want to model him in a final pose, its easier to draw and model in a standing "T" pose. Only because that was you can see everything there is to see on the whole body of the character. Especially around the crotch area and the under arms and hands. You're on a great start. Keep it up. If you do decide to model the character in that pose, keep in mind the difficulties of UV-ing the character.