I know this is an old thread but I figured I would post this as an answer for others viewing this thread with the same issue.
Blender Cookie is a wonderful site for learning to do 3D models, obviously, esp if its in blender. They also usually allow download of the files associated with the various tutorials unless there is licensing issues. Some times you have to be a paid member sometimes not. Anywho, they have some great stuff on modeling humans, both male and females. The parent site is CG Cookie.
So I would start there.