@TatraT815 There's also the "federated timeline" (don't recall if that's displayed automatically!) which will show you the toots from your own instance plus all people followed by other folks on your instance, I believe. It's not a Twitter-style global view (that's difficult-to-impossible to achieve in a federated system like Mastodon), but should hopefully provide some places to explore :)
@TatraT815 Yep, pretty much! It's *very* close to e-mail actually, in how it works (though *technically* speaking the protocol part is ActivityPub and Mastodon is just a client)