This is only required if the instance has never seen the community before. You can read how you can accomplish this in the Lemmy docs or the Fedecan guide:

Is doing above only for lemmy instance admins? Or is this for regular users? Thank you for the extensive write up, btw.

Thanks, currently trying this out. I’m seeing a lot of things I’m not interested in, would be nice if they could have a slider for what percentage of things you’ve subbed to vs new things.

Also a reddifugee, is there something we need to do to interact with the whole of Lemmy instead of just the server you registered on? (link please?) TIA