Are you using any reference or just modeling from imagination? Because most people use a lot of reference and it's much easier as a beginner if you try to get plenty of it and use things like image planes to give you a guide to model from. Also try the bevel tool, you have very sharp edges and they have to be beveled to reflect light.

Here's some tips on renders, because if you use a black background it's difficult for others to see what they're looking at. Try either to create a backdrop, they create one in this tutorial but basically it's just to extrude the back edge of a polygon plane with no subdivisions a few times until you get an L-shape, press the 3 key, and put any grey material on it.

Another thing you can do is select the perspective camera and change environment color from black to grey, it will do the trick as well (I added a screen shot).

Final thing, when you post work in progress people usually need to see the wireframe to help you better so watch this video and make a wire render of what you've got so far.
howto wireframe on shaded render - YouTube

And just keep going, remember the difference between something that looks ok and great is lots and lots of time!