Consider a next.js-style setup guide for Matrix

https://nextjs.org/learn/basics/getting-started/setup

I really like how the guide says to run a bunch of commands than asks you what you see, like so:

A similar guide to Matrix might help, maybe. I'm not sure if setting up Synapse and co is actually simple enough to make the guide helpful, but it would be interesting to catch the common issues before someone lands themselves in a support room.

Use the linked Next.js basics setup guide as the reference; first assess whether setting up Synapse and related components can be reduced to a beginner-friendly sequence. Done means a Matrix setup guide that runs commands, asks readers what they see, and catches common issues before support.

Written by the indexing model from the issue text.