There isn't a guide but you basically need 2 nodes. I mean you could do with 1 node but whomever you're peering with has to trust you because you're using magic money.

On both the nodes you will need to add protocol.option-scid-alias=true and protocol.zero-conf=true in their conf files.

Install balanceofsatoshis on both nodes.

On the node receiving the inbound zero-conf channel run

bos inbound-channel-rules --trust-funding-from

And keep the command running.

On the node opening the channel from run

bos open --amount --type private-trusted --avoid-broadcast

Use public-trusted as type if you want the world to know about your channel.

All this is LND nodes btw, idk how to do it with other implementations.