watch a bunch of blender tutorials, or get a model from sketchfab. I suggest sketchfab for your first, second I think you should watch tutorials for glowmaps and stuff. Learn about JBEAM or make a mesh slap.
This might be a good guide for you: https://documentation.beamng.com/modding/vehicle/tutorials/basic_car_tutorial/
Thanks! I will still have to get familiar a bit with both the jbeams and blender modeling. But once I hopefully figure everything out. it should be all good