well, thats nice for a first model. The topology on the butt looks funny lol.
A few tips:
Use a mirror modifier. Not only does this save time, it also makes sure your model is perfectly symmetrical. Save the file first (in case you screw up), make sure the center of the object is in the center (F9, mesh, center new)
Then delete half of the mesh (in vertical direction that is), and add the mirror modifer. Press Zkey to set it proparly.
Also, what helps with vertex layout, is to press the empty round circle next to the up/down arrows in the subsurf modifier, so the vertices are kinda like subsurfed too.
Oh and try to get rid of the tris, they look bad when rendered
Well, hope that helps, good luck