The sensation of flying and or falling are generally precursors to the OBE. “Especially Falling” in my experience.
There is also a sensation of vibrating and a roar, like standing next to a train track as a train rushes by or riding a motorcycle at 100km per hour down the highway.
Then it falls away and the "Astral Body’ (By necessity I have to use that silly term for the brain state of projecting a body into my consciousness. ) appears.
After that, nothing in your frigging life changes. You are not special in any way. You do not glean any miraculous insights into the world around you. And you still have to wipe shit from your ass after taking a poop.
Anything you hear beyond this is complete and utter bullshit! OBE’s are just brain states. Nothing more.