My preferred way to browse here is using All and blocking communities I don't want to see. That way I get exposed to new things I wouldn't seek out on my own (for example: British archaeology)
I accidentally blocked a community while trying to block a user and when I went to unblock it, I saw I had 1250 communities filtered. If I had to guess, 90% are either porn, sports, or anime.
LemmyWorld is already defederated from a lot of instances that the average user is likely to be blocking, anyway, so chances are those communities won't show up in your All feed to begin with.