First thing that caught my attention was the lighting. In real life, if the light source was coming from the back, first of all, the audience wouldn't be able to see much, especially if the LED lights were lit. The shadow underneath the car would not look like that. It insinuates that the car is backlit as well as the person. That means, aside from the area near the headlights, the car would be a silhouette, lighted along the outline. Same goes for the person. Right now, it seems as though the main light lighting ther person is on the right side, but if those lights were being him, they would actually be outlining him on both sides, and the center would be dark-- almost black.
Assuming you turned the car lights off, the next problematic area I notice is the bumper of the car. The bumper does not seem to continue on the right side of the person. I suggest that when you make the structure of your car, make it as if the person is not there. Just make it one continual piece, and you can always layer the person in front of it.
Overall, you do nave nice colors and composition. You just need to work on realism. Good luck!