If you want to create normal cars then you can use Godot`s built-in vehicle body. But it is not so advanced, so if you want, you can create your own vehicle body for better or realistic car physics using rigid body and raycasts. It is mentioned in the docs I can remember, so you can also read the Vehicle Body docs of Godot.
Thanks for the answer . For what I need vehivlebody is good enough indeed.
I only want good camera behind the car, that is a different part what is also difficult. I now use a camera pivot with 3d camera but hard to find out what is the best script to use then.