*GitHub*
and 2nd
"I am using Nostr (the protocol)." - a protocol able to create a "social" network
"I have joined Nostr (the social network)," - or does anybody say "I have joined the Twitter/the Facebook/the Instagram/the Whatsapp"?
Github (also no the) says -The simplest open protocol that is able to create a censorship-resistant global "social" network once and for all.
https://github.com/nostr-protocol/nostr#nostr---notes-and-other-stuff-transmitted-by-relays
Discussion
If its cold outside and you're bored Snort a little GitHub up the Nostr, you'd probably end up a bid Nostrudled but once you can see your Iris again the feeling is Primal