Make a place. Something specific and discrete, like one room in a structure, or a single fixed perspective. It can be graphical or text or diorama or desktop folders or anything you desire.

Examples
Polly Pocket, The Big City, Chime Shrine, 10 Seconds in Hell

Thoughts
What is idiosyncratic about the place, that would be diminished if it were universalized to fit inside a larger work?
Are you trying to tell a story through the place or just focus on the feel?
What can you see from the place that you can't reach?

Resources (feel free to suggest more accessible tools)

Twine (hypertext)

• Free twine hosting on Philomela
• Tutorial

Unity (3D)

• Basic Unity Tutorial
• Simple Movement Code

Gamemaker / Construct (2D)

RPGMaker (topdown rpg format)

Tyranobuilder (visual novels)

Inform (parser)

SketchFab (upload 3D models for viewing)

MagicaVoxel (8-bit voxel editor and interactive path tracing renderer

Vertex Meadow (make explorable 3D places using a 2D paint-program-like interface)

run by Porpentine, who you can reach here. logo & bg by neotenomie