For a first matte brush it's actually awesome!

The overall lighting of the paint is good, and it looks very tidy, however the white glow around the rear is a bit too faint, and a bit too spread out and blurry - the same with the red glow around the headlights. Try and avoid large areas of low opacity 'glow' on chops - they never quite look right
The only other issue with the paint really is some of the split lines around the front - they seem a bit too thin, and not quite dark enough
I also agree with the others about the rims, or at least the front rim, it's too bright compared with the surroundings
The only other issue is that the car doesn't quite fit the backdrop - try moving it down a little bit so it 'sits' on the ground a little better
Having said all that, it's actually a very cool chop - you should be proud

Some lovely little details like the stickers and in the interior - Well done