Lemmy does not have an engagement based algorithm. It does not over analyze your every move to keep you on the site. This means you will have to do content curation yourself.
First of all, the block button exists, use liberally.
Second, the subscribe button exists, so use it to curate a nice subscribed feed
Third, I do believe there are third party clients (lemmy apps made by others) that have a word filter feature which allow you to automatically hide post and comments which contain certain keywords. (I think Voyager has that. Download mobile app here. Use the site version of the app here. Keep in mind that it uses lemm.ee as its default instance.)
But yeah, content curration is kinda just left up to you. Subscribe, Block. That's it.
Alternatively, you could join a "themed instance", that is, an instance made to house a particular community or interest, like that star-trek instance, but Lemmy does not have enough users for those to be able to exist.
If you want creative stuff, might want to have a look at !artshare@lemmy.world? Sorry, I don't have much for you.