What’s the most user-friendly guide to get this set up on a domain you own? 

 https://jb55.com/.well-known/nostr.json 

 you can use https://damus.io/key/ to convert your npub to hex 

 I followed this guide, it was very easy to do.

https://nostr.how/en/guides/get-verified  

 🙌🏻 👍 

 you mean one could use his own domains? that would be nice, especially since we consider to use Nostr as 3rd  platform to use 

 yes, I did it with my own domain. 

 I quite like the extra @ ditto uses at the beginning. No idea why it does that. (To make it less like an email/lnurl?) 

 it's an activitypub thing 

 oh very neat thank you 👌🏼