im going to point out the mistakes i can see just so you know what to improve
The Redbull sticker is overlapping in the rear window, you should erase the part over the window to get a more realistic look, also the same sticker overlaps on the rear over fender and it should distort a little bit because the angle of the rear fender is not the same as the door.
The tint on the windows is way too dark and it takes away from all the work you did inside the car, you can barely see anything inside, also if you want the windows to be really dark from the outside they should look very reflective, almost like a mirror so adding a few enviroment reflections like clouds or trees or anything from the surroundings will help you achive that effect.
The stickers on the hood look flat and they should have a bit more flow with the hood curves and the perspective.
Overall is a nice chop it just need some tweaks here and there.