There are many ways to discover interesting accounts on here. How many of these have you tried?

1. Follow hashtags
2. Join groups
3. Follow people, they share posts by others
4. Use FediFinder to discover Twitter people who are also on here
5. Browse directories
6. Follow curators
7. Browse trending posts & hashtags
8. Use StreetPass for Mastodon to discover website accounts on here
9. Hang out on Local & Federated timelines

More info on how to do all of these at https://fedi.tips/how-do-i-find-accounts-to-follow-on-mastodon-and-the-fediverse-how-do-i-find-my-friends/