I think people should pay (way) more attention to the domain name when creating a Lemmy instance. This is, of course, for admins of instances.
Instances such as lemmy.dbzer0.com and lemm.ee and such are just so unfriendly, in the name, that I think they do a disservice to Lemmy. They end up splitting the community. Due to the weird domain names, there will be privacy.lemmy.dbzer0.com, but the domain is just so unfriendly that people will also create privacy.lemmy.world and privacy.lemmy.ml and etc and it just creates unnecessary friction.
If you are considering creating a lemmy instance, please, please, think of the domain name. You cannot change it later!
You can’t fix this because this is how the fediverse is designed to be. Multicommunities might be a thing in the future which might solve this “issue” of yours visually: https://github.com/LemmyNet/lemmy/issues/818