ok - first i would definitely lose some of the wires around the eyes and mouth - you don't need them - i would also lose some in the cheek / nose / forehead area - just use collapse. try to get the edge flow working a bit better in the cheek and forehead areas. look up the topology thread on this site and try to look up examples of good edge flow - you'll see that a lot of good finished head models have less polys than you already have.

overall tho this is a really good first attempt - your picking up on a lot of things that people usually miss like the position of the mouth / eyes.

keep at it.