Azz on Nostr: Trying to use nostr from my Mac for the first time. Can I use npub1getal…nfmor is ...

Trying to use nostr from my Mac for the first time. Can I use npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfmor (npub1get…fmor) is that invite only for the extension too?