I hadnt heard of Nostr, until now ...
Are many people using it, and is it 'federated' as in people can set up their own servers and inter-communicate?

This forum looks nice, graphics and logos etc.
May I ask how long did this take to set up from start to finish?
And which mail service do you use to send out the 'confirmation emails'?
Im asking this because its the thing I had most problem with.