You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: !technology@lemmy.world
This is a most excellent place for technology news and articles.
I feel like Rocket.chat would be the best Fediverse alterantive to Discord
Rocket.chat started using the Matrix protocol and became federated on June last year, so you can use both ;)