There is no algorithm on here, so it is up to you to follow people, follow hashtags, follow groups, browse the Explore tab etc.
I get that algo-driven sites are more convenient and more addictive, but this place is meant to be more friendly and sustainable, and with deeper connections and less toxicity.
I've done an article on discovering other people: https://fedi.tips/how-do-i-find-accounts-to-follow-on-mastodon-and-the-fediverse-how-do-i-find-my-friends/
...and here's an article on making your own account discovered more easily: https://fedi.tips/how-do-i-get-more-followers-on-mastodon-and-the-fediverse/