@danru
Hashtags are mastodon algorithms. Nothing puts what you like in your timeline.
Use hashtags, and also follow hashtags. Make a post with potential hashtags. Post it.
Open it. Click on the hashtags, see what you get. If you like, FOLLOW that hashtags, there is a button on the top of the column.
You now follow #climate as if it were a person, #pi #Cosplay #pie
Now Follow folks, check who they follow, follow them, you only see who you follow, who they boost.
Boosts, follows, hashtags.