What to populate scenes in with?

I’ve been working on a project for Godot engine, and also I’m going to start working on a Blender project that I started a while back, but one problem that I have, probably the biggest problem, is that I have no idea what to put in my scenes and levels the fill them out and make them more lively. Anyone know of any tutorials and or advice on how to figure out what to populate scenes with?

My best advice which applies to everything in the industry is to get preferences. Go in google image search, pinterest or what ever you feel could have those images and start to find and gather a good lot of them (in your particular case and theme) then analyze and find those tiny details that makes it feel alive and crowded.

Yeah, I guess that’s pretty much all that I can do, except walk around town and look at real references.