In case you missed it, Mastodon and the Fediverse have groups, which are really useful for discovering conversations on specific topics. They work equally well on all servers.
Find out more info on how to use them at:
➡️ https://fedi.tips/how-to-use-groups-on-the-fediverse/
If you're looking for groups to join, I curate a list at:
➡️ https://fedi.directory/tag/fediverse-groups/
If groups are too busy and overwhelming your Home timeline, you can split them off into their own timelines using Mastodon's Lists feature:
➡️ https://fedi.tips/how-to-use-the-lists-feature-on-mastodon/