Hmm, from looking at this, I can see that it can either turn into a really good head, or a really bad head. I really love the scheme of the hair, but some parts seem to jagged to be hair, if you know what I mean. For eyes and mouth, I would probably just look up tutorials, as Gulo said, probably anime. But just looking at someone's eyes and going from there is also good, but that's completely your decision. Also, I feel you could add some more detailed lines, or more shading, just to give it a little bit more depth.
From what I can see so far mate, this is a pretty good start. Keep it updated and such, cause I would love to see how this turns out. Good luck, 7/10 at this moment.