I'm new too but this is how I understand it. When looking at communities click on the ALL tab not local... That shows all communities that, that instance knows about (which includes communities on other servers like ttrpg.network) If you do it on a large server like lemmy.world then your pretty much searching the whole fediverse
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I'm aware of this, but I'd love a way to only browse specific other instances as if local. That way you could narrow your browsing to a topic if an instance is specifically for that topic. For example if there was an instance just for gaming, another just for sports etc. you could switch between different topics and narrow your browsing to only show communities for that instance's topic, depending what you're in the mood for and to discover new communities.
It seems like instances focused on certain topics are a logical way for the fediverse to work.
As @meanmon13 says here, you can put the feed on an “all” modus so that you can view all the content from communities that have been federated with the lemmy.world instance. If you can’t find a community that you want to subscribe to, then you can first check if the instance the community is on is blocked by lemmy.world here. If it’s not blocked, then you can simply just search for it like this: “!{community name}@{instance}”. {insatance} is without “https://“ so it could be for example “lemmy.world”. If you wanted to find the fediverse community on another instance then the search term would look something like this: “[email protected]”. I hope this was helpful. Oh and to search for a community, you can go here.
The way I've been going about it is keep two tabs open. One with my home instance on its search page, the second browsing the communities on another instance. If I find one I'd like to sub to it's easy to copy and paste between tabs. Everything posted to that community from there on will show up in my subs on my home instance for browsing and interacting with.
That's been my solution, although that still doesn't allow me to browse all communities for a specific topic on my home instance. But I'm sure we'll have some sort of multi-community function soon.