Good effort there.
My suggestions for improvement would be shoot raw, as this looks slightly overexposed to me. I would also prefer to see more track to the left of the car and less behind him.
We want to see where he is gonig to as a pose to where he has jsut come from.
Laslty, and this is not your fault either, but the background is quite poor, but there is too much foreground. I'd crop up a little to loose some grass and crop some of the track to the right of the car and it will bring out more detail inthe car and hopefully make it a bit more attractive.
I can run an edit if you like?