Okay where to start (And don't take this as evil as some people do, it's just criticism
), the arms look pretty good, although not really anatomically correct, the torso is way deformed and too boxy, and the hip area just looks completely odd, the feet are too triangular (As in shape, not polygons) the legs are way too boxy at the front and the head just looks somehow wrong.
And there's a big visible seam in the middle of the model where you mirrored it, probably some normal issues or bad geometry, the hands, although hard to see, looks a bit too boxy and too thin, and the edge flow looks completely wrong for what you want for a character (From what I can see at least from the wire screen you showed.
If you want my opinion on how to improve this,
use reference, I can't stress that enough, to learn the human body and how to model a character in general it is almost invaluable to have reference images of the human body to model from. Trust me.
Reference images can be easily found by a quick google search, which you can do yourself with minimum annoyance
I would also advice to use another modeler than Milkshape, as while MilkShape is a great animator, it doesn't stack up quite as well as a modeling suite such as, for example, Blender.
As said above I would advice you to learn Blender, yes the UI looks confusing at first, don't get scared and run away by it, once you've watched some tutorials on it you will notice that it is a very easy to use smooth UI which assists to the great features of the software as well.
Again, this is criticism, don't take it any other way, for a first human model this is pretty good, keep on modeling and you'll do great things with enough time, practice makes perfect right?
