You called yourself a 'really big noob', but that doesn't show off in your work, it looks very good

the windscreen/rims in the last image look waaaaay too clean though.
It looks like someone dumped it into a lake with soap and stuff, so that the body started rusting and the glass only became more shiny :p

and about the second image, I believe that when you crash hard enough to crush the entire front of your car, the back of the car would at least have some minor scratches/mud/dust on it :p

I must say that you've done a great job overall, those little details just make it look a little bit less realistic