Tips to make the scene more realistic

Hi,
I am making a car animation and would like to know some tips for making this scene realistic. I am a beginner. Also let me know how the current render looks. Thank You

The thing that first jumps out at me is that the road pavement seems to be way too coarse compared to a normal picture.

Really, the meta-approach is: “Compare to reference material. What is off? Fix that. Repeat!”
And as you keep fixing things, you’ll get down to “this leaf is one inch too wide” and that, too, will have to get fixed to make things “more realistic,” so there’s also a point of “good enough to be done!”