first, please post the screenshot as a .jpg
anyway, I whould say that you start off with simple models and move up to more elaborate models like guns and people. I started with simple box objects, then started to create simple kitchen things like pots and pans. I then moved on to create very detailed models of floor lamps and other objects. if you are a newbie, you should start out with a easier 3d modeler like anim8or then move up to milkshape (because thats what it looks like your using) and if you get good enough, you should try and invest in a very high powered modeler like 3ds max. The model you made isn't that bad for a first.
Hope this helps,
Brian
@opposing force,
well I like ice cream