I think it was either nostr:npub1guh5grefa7vkay4ps6udxg8lrqxg2kgr3qh9n4gduxut64nfxq0q9y6hjy and/or nostr:npub1qny3tkh0acurzla8x3zy4nhrjz5zd8l9sy9jys09umwng00manysew95gx that I heard it from. 

Then I just started reading the nip repo and used the sites/apps from nostr.com. I had been looking at other social alternatives quite skeptically at the time, and still took me a bit to decide I wanted to build my signer tool and start using nostr.