Thanks to nostr:npub1m0sxqk5uwvtjhtt4yw3j0v3k6402fd35aq8832gp8kmer78atvkq9vgcru and nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm, I converted my business email address gpietras@djp.pl into an LN address. Had to get a little help from my IT department, but surprisingly, it was rather easy. Look forward to a world where all email addresses are LN addresses by default.

https://guides.getalby.com/overall-guide/alby-lightning-account/where-to-use-your-lightning-address/how-to-use-your-own-domain-as-your-lightning-address