Here is how I created the scenery seen on the image.
As first, place a single track on the ground:
Then, add some switches and track continuations (see https://www.modelrailwayeasily.com/track-building/simple-turnout/ for details about how to do it):
After that, add even more track continuations and place more engines, waggons on the newly built tracks. Also add an overpass to the scene making it even more interesting:
Put on roads, truck, signal:
As a last step, add vegetation and buildings to the scene. Enjoy!