Looking pretty good for a first mod, man! The face does need work, but I would say to keep at it. Faces are usually one of the biggest payoffs. If the face ends up looking good, the rest will, too.
Well, I suggest finding better reference pictures and maybe combining them to get a more balanced face. The attire looks good, but his face does not resemble him. We have some pretty cool tutorials and resources for Hires modding here. Just click Phil's "Tools & Resource's archive" in his sig! Good to see new members contributing, and keep trying and experimenting.