Need help with train models

[Q8er2y]

Recently I wanted to make a mod with trains, but there aren't any models/guides I could find that helped achieve that vanilla train look.

Because of that I decided to make a post here.

My questions are:

Are the rules for modeling train wagons/locomotives any different from normal factory entity modeling?

Are there any blender templates for train modeling?

Any advice will help, please correct if I said anything wrong, I'm a beginner