After your login, you are connected to a number of relays (depending on the client you are using). You can only see content, your relays distribute.

Try primal as client. And set up your authentication.

Make sure you’re aware of NIPs

https://learnnostr.org/definitions#tags

Nostr is more of an ecosystem for developing apps that a social media protocol. There are great apps to explore that are based on Nostr.

Blogging, podcasts, music collaboration, streaming…

As for content is lacking quality. Bitcoin floods, zats addiction etc.