This video steps you through setting it up using eCash, which is quick easy, but it is not Self-custody.
If you want a self custody Lightning wallet, you need to but 100,000 Satoshi to open your own Lightning channel, which will cost you around $130 the days.
Once you have a lightning address, you copy and paste that into your Nostr profile using Amethyst.
nostr:nevent1qqsd6ha0yep442kst79x54y5pcj9l5kd8una2tmjwn7j44n99ga99aqpz4mhxue69uhhyetvv9ujummvv9ejuctswqhsygpdnpemykljmknpg95y63x4adm27k03vaug5k8rvw43vu07lm587gpsgqqqqqqs40xtsu
