I've been explaining it as countries/international travel. Lemmy is a country, Mastodon is a country, you can travel freely between them but you need a passport. Each service has it's own government whose rules you have to abide. Lemmy instances are like states (or provinces or what have you), where you can just... freely travel between them. Each instance has it's own local government whose rules you have to abide. Communities are like cities/towns, with their own small local government whose rules you have to abide... etc, etc.

It'll be loads easier. The Lutris installer is set up to automatically handle an error that Battle.net throws when you try to launch it, some BS about the way they package their QT platform. It's just a terminal command away from being fixed, but future updates run a real risk of breaking it again. It happened to me, and I spent ~30 minutes trying to get it to work again before I gave up and just... Reinstalled the damned thing with Lutris, and it worked like a charm.

Speaking of Diablo, I got a notification while I was typing this message... 😂

Lutris is great especially if you have games that need a little tweaking that aren't a part of Steam, GoG, or Epic. If all your games are on one of those three, I'd stick with Steam/Heroic personally.

Lutris is the easiest way to get WoW up and running on Linux, for example. If it weren't for that, I probably wouldn't have Lutris on my PC.