1) you need a wallet which works with the bitcoin lightning network. nostr:npub1hcwcj72tlyk7thtyc8nq763vwrq5p2avnyeyrrlwxrzuvdl7j3usj4h9rq is a popular choice to get started, although there are many options.
2) associate your lightning address with your nostr account.
3) enjoy! 💜🤙