I really like what you've done here

A good attempt at brushing, a nice atmosphere and a simple but effective kit design
Together these help to make a very cool chop
Some tips for the future:
- Try and use selections more when brushing (pen tool). This should be used mainly around body shapes, as it keeps the bends and edges to the car nice and tidy. If you look at the bottom of the trunk/ boot where it meets the bumper, it appears to be quite blurry from where you have brushed free hand - there should be a nice sharp edge here
- If you look at your paint reference, you will see that all the reflections are very sharp and smooth - selections can be used to achieve this effect on the paint where there are big colour changes. A hard brush will also work, but isn't quite as tidy
- Try and use a different backdrop to the image that was your paint reference, otherwise it looks a little too similar - this is more important as you start to move up the chop levels, but it's good to get into the habit now
Overall a nice chop though

Just bear these in mind on your next chop ^