To get you into the proper mindset in learning how to differentiate and interpret the many experiences (Dream, Lucid Dream, AP, OBE) one can have in the non-physical, I think the following statement sums it up nicely:
“The difference is not in the nature of the reality but in the consciousness that observes/experiences it.”
What I’m saying here is that the nature of the reality you find yourself in (Dream, Lucid Dream, Astral Projection, Out of Body Experience, etc…) isn’t defined by that reality. It’s actually the opposite. You define the reality… the nature of your experience is defined solely by your consciousness and how aware you are.