You simply need to go to coinos.io and creáte an account, then you can go to settings/preferences/NostrWalletConnect and configure your nostr secret key. Then go to Amethyst and copy the coinos address in your lightning wallet to receive zaps to it. And to send, you can simply click on zap in Amethyst and it will automatically connect via #NWC to your coinos wallet to send the zap. You only need Amethyst installed in your device. And if you want you can pin the coinos webapp to your phone's main screen to see your balance and transaction history.