Well, you should just both have blender then shouldn't you!
*runs*
Anyway, as to the ship, it's a great start! And really nice for a first model. Well done.
However, there are some poly errors and an oddity present - mostly just weird face connections that shouldn't be there. You can see them in wireframe:
As for recommendations, well remember that you can always add random greebles such as extrusions, fins, pipes, recesses and the rest. For overall shape features/development, here's mine:
I've attached a blend file where I've included the recommendation model along with a fixed geometry version of the original. A couple of other things to note is that I've deleted the duplicated half of the model and turned on the mirror modifier - the ideal way to do symmetrical modelling.
Something to note about that for future models is that it will mirror about the centre of the object - so you need to keep the centre (the floating pink dot thing) in the centre of the mesh or you'll end up with some scary looking results.
Also, I'd recommend you have a quick look to compare what the geometry in the red circles looks like in the original and the fixed versions, so you know the sort of thing to look out for in future models.
Still, well done.
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