If you are talking about associating a LN address directly to your Start9, then you can try what I did.
nostr:nevent1qqswda6lkxjxkf6dkcaup327vnan9ytfaxxnwaercj8ygs5musffz9sprdmhxue69uhhyetvv9ujumn0wd68yctnwdjhguewvdhk6q3qh5hedatrg747jpry68pzp5ynuvjlusfp9yntn6uvq4k9764ss2qqxpqqqqqqzjwxjxa