I've never run one before, but I would imagine you create a character and imagine you are thrown into a new world. Backstory would be up to you, but we all somehow ended up in this world.
I don't have lore and such like DAWN does, but I'd imagine we can practice being totally immersed into the game by pretending to *be* our minecraft character. Kind of like how people RP in WoW. We talk as them, and type in actions as we do them. (Not every little thing, but you know what I mean)
I'd like to get a few people on board before I turn my current server into an RP server. So far it's just me and my partner, so I'd wanna make sure we have enough people to make this fun.