Nice project and good setup so far - however some small things that can be adapted.
-
Your domain is too small and the boundary conditions (BCs) will affect the flow field in a negative manner
-
Your car is too high and the tire should optimally touch the ground to mimic flattening due to the weight
-
Inflation layers are missing for boundary layer generation
-
Refinements for the wake region need to be added
What I would recommend is that you have a look at some tutorials/workshops we did in the past. A good tutorial can be found here: Step-by-Step Tutorial Session 2 - Full Car Aerodynamics (Part 1). Do not be distracted by the different interface as the tutorial is for the old workbench but the naming for the operations etc. is the same. Let me know how things go.
Cheers,
Jousef