Their username checks out, I suppose.

Correct. If no one from your instance has subscribed to a given community yet, it might not show up in your search results. Lemmyverse.net is a good way to find small communities on other instances.

Lemmy keyboard navigation

A RES-like userscript to easily navigate Lemmy with your keyboard.

Violentmonkey + Lemmy Universal Link Switcher

Best way to avoid accidentally leaving your home instance.

Lemmy Universal Link Switcher, or LULs for short, scans all links on all websites, and if any link points to a Lemmy instance that is not your main/home instance, it rewrites the link so that it instead points to your main instance.

I guess I’ll go first:

https://lemmyverse.net/communities

Best way to search for communities across the entire platform.