Okay I have no programing knowledge or 3d modeling knowledge but I want to learn how I can resize tires and possibly wheels because i cant find a tire that I like and fits for this specific modded car. I would love if someone can help. Tires I would want to learn first since that seems easier and then I would love to learn on how to do wheels too. Thank you in advance
You would need an understanding of the basics of BeamNG modding as well as the .jbeam file format. That way, it would be infinitely easier to explain. https://documentation.beamng.com/modding/vehicle/intro_jbeam/ You can read into this article and all the subarticles of it to gain some knowledge.
