I have a PCX model. However, I want to create a PCX motorcycle mod, but I lack the skills to make it. I would be really grateful if you could make it for me...
^^Yeah, this^^ OP, there are people here who would be happy to help you, but 'help' is the operative word. Unless you're paying someone, most people will dip almost immediately once they realize they're the only one doing any work. That you already have the model is nice, but you might be surprised to learn it doesn't make the task much easier. Now in the unlikely event that you're absolutely determined, I'd recommend giving the documentation, and some of BeamNG's props a look-over. All of BeamNG's proper vehicles use jbeam, but so do the props, which are smaller, simpler, and are more accessible for those just starting out. Play around with it first, get to know how it works, make some simple structures, etc. and then move up to bigger projects. That's how I got started