You're intuition is right Out of time - it's way easier than it sounds - IF one can silence their chatter box mind. If one can't well yeah, not gonna happen, because silencing the mind is the first step. I often get folks who ask me to take them out of body, first thing I ask is can they silence their mind chatter/suspend thought. If they can't then I can't take them - like literally it's not possible.
If they can silence it and it's an easy guided trip, if their third eye is active then they can see where we go, otherwise they have to feel it kinesthetically. Easy even if they have never OBE'd before. They may not see too much the first trip as they have to learn 'how to See' or How to Hear, but it comes fairly quickly to those who are motivated.
The dungeon was 3D as far as we can tell - a place somewhere and somewhen in Europe most likely, possibly during the Inquisition. We ended up there by following someone's physical pain in their body. It was most unexpected.
You could be right about getting one's desires/intentions in the 6D immediately, however as Visitors there and not Inhabitants who've evolved to live there we don't necessarily experience that. Though we are able to move about on our Intention alone. So maybe there is a connection?
I played a number of them over a decade period, EverQuest, StarTrek Online, Karos, Myst, War of Legends, EverQuest 2 and a few others.