You click join-lemmy.org and are presented with a page of information about the fediverse, links to set up a server and pictures of code...
Not sure what universe you are from but in my reality that's just bullshit. What you said is there but right next to the "set up a server" button is a "join a server button". And right above the scary code pictures is another "join a server button".
People just don't do Beatzoid weddings anymore :(