No Fediverse platform I know of uses algorithms like the ones in today's mainstream social media, so you'll have to get used to seeing the same thing every hour or so. Try subscribing to even more communities, changing sorting algorithms or browsing the "All" feed.

I occassionally find and remove communities through the "All" feed or random "recommend me communities" posts in communities such as:

• !asklemmy@lemmy.world
• !ask@piefed.social
• !asklemmy@lemmy.ml

Try creating a post in one of them.

If you want to help build a new community, try finding new ones. Creators of new comms usually post them in comms such as:

• !newcommunities@lemmy.world
• !communitypromo@lemmy.ca

I do wish that there was a "Random + New/Scaled/Hot" sort.