If this is your first try at modelling, I would definitely not recommend modelling humanoid heads. There is nothing, and I mean NOTHING that the human brain is better at picking up discrepancies with. Just think how many thousands of faces you are capable of recognizing. That combined with the simple fact that the human head is an extremely complex object makes it one of the biggest challenges a 3d artist can face. I have been doing 3d models for about two years, and i have yet to make a human head look particularly realistic. My advice to you is to start small, with things that use simple shapes, eg hand tools or boulders, or things that dont require much adherance to real life conventions. While this might not be as exciting or rewarding, it does teach you the skills you need to model more complex objects, such as plants or monsters and maybe eventually even humans. To be brutally honest, I have difficuly recognizing the human head as such, and im not sure where the eyes of the monster head start and the mouth begins. The latter problem could be fixed by some basic texturing if you feel youre up to it, or if you want you can email the model to me at
Myomerhead@hotmail.com and I will texture it for you myself. Please understand that it is not bad for a first attempt, but then your first attempt probably should not be something so difficult in the first place. But anyway, keep up the good work, and who knows, you might end up becoming one of the best.

[EDIT] if you want to send me the model, .3ds format would be best, though I can make do with any standard 3d file formats if necessary.