You literally just hit a button in the app and it does it for you in one second. What's difficult?
Discussion
#[0] #[1] I'm talking to you through a long string of seemingly randomized numerals, and most people find that inconvenient.
How will they feel about keys?
That’s what NIP-05 is for. I would tell someone add me on Nostr by searching xanny@xanny.family which brings my profile up. No need to actually tell anyone your public key.