I'm not sure how to set up that sort of offer, and I'm unsure if it's a good idea for a first-timer, is it?
Discussion
It isn't very complicated. You just have to choose if you want to buy or sell, your payment method and the trade amount. In the advanced settings you could set a trade range or a higher percentage for the collateral.
I'm pretty sure btc sessions has a tutorial for robosats
But what about the escrow thing? From what I heard, most DEXes use that and I have no idea how the technicalities work for the person making the offer.
What's with the escrow? You have to lock it before you can publish your order. Therefore a LN invoice QR code will be presented, pay it with a compatible wallet and you're good.
You can look up here for more information