For a first green this is a 10 hands down- very well done- Compared to others who have done more than one it is still very well done- a 7. Have you went to any of the sculpting sites yet? If not pm me and I will send you some links
For you first green this is really very, very good! The best advice I can give you is to keep sculpting! Your work on the face is one of the best first-attempts I have seen.