I need help with modding

(sry for my english)
Hello there, i am a very big bus fan and in my opinion BeamNG drive is the best Bus simulator you can get, but the Wentward has a to big wheelbase for european maps. I asked other peoples if they would also like to have new european bus in BeamNG but that escalated quickly, so i decidet to make my own bus for BeamNG. I have a bit Blender experience and i understand a bit of modding but nothing of coding so i realy need help from a person that knows something about modding. I read and watched many tutorials but they are all outdated or to complicated. I already added the axels form the Wentward.
Please only necessary answers!

 

There's the modding for dummies discord server, this and the official documentation should get you done.