Here you have a guide about submarine swaps
https://darth-coin.github.io/nodes/lightning-submarine-swaps-en.html

But remember: submarine swaps must be used only to regulate your own liquidity, not as usual payments. Submarine swaps are mostly used to refill drained LN channels.
Is better to keep open a LN channel as long is possible.

DarthCoin

lightning

Onboarding Bitcoin users via lightning

sirstackalot

Thanks. Submarine swaps seem interesting (I saw Alex bosworth post about it a couple of years back and it intrigued me but never delved into it). Looking forward to learning more...