In many ways, Mastodon feels like rewinding the clock on social media back to the early days of Twitter and Facebook. On the consume side, that means that your home feed has no algorithm (this can be disorienting at first).
Practically, it means that you see only what you want to see and only see it linearly. You never wonder “why am I seeing this and how do I make it go away?”. Content can only enter your home feed via your followed tags or handles and the feed is linear like the early days of social media.
FWIW you can follow hashtags in mastadon If you know where to look you can see trending hashtags In other fedi clients (particularly firefish) you can configure antennae and channels to give you the ability to have pre-set feed filters and focuses (e.g. search by hashtag, keyword/subject, etc) You can also curate lists (can include people you don’t follow if you don’t want) in case you want to look at what the law or history or cycling people on fedi are talking about just now. Often when I want to change subject I’ll check to see what #lawFedi or #histodon or #biketooter have to offer today
If that sounds a bit like rolling your own algorithms, that’s probably because it sort of is