You don't need to download anything. Just visit https://nostrnests.com
First for me nostr:npub18ams6ewn5aj2n3wt2qawzglx9mr4nzksxhvrdc4gzrecw7n5tvjqctp424 … what do us newbies need to download for it? So those who are new as well can get the 101.
Discussion
Cool. I think I show up as anon. So need to link my pubkey somehow?
That's correct. The current version is not a full client. You can only link and very your Nostr npub. You can do this via the gear icon, editing your profile, posting the verification text on Nostr, pasting the noteID into Nests, and following the instructions.