...about the middle, lower and upper worlds, could someone give me a rundown...
This is my experience:
The Lower World is the realm of the Guide and Spirits
. This is NOT Hell, but a "place" deep in the Earth where these helping spirits reside. You journey to this place, usually through an opening in Earth, like a cave or waterfall, or even by following tree roots or a rabbit hole down into Earth, to an underground River that takes you to the Lower World.
The Middle World is this experience, this reality, where everyday life exists
. Here, when you journey, you can traverse great distances, visit living people, and do all sorts of healing (or mayhem), depending on your intent.
The Upper World is the realm Beyond Thought & Time, and Eternity
. This is where the ancient Wisdoms are, where time has no purpose, and where we return to when we pass over the Rainbow Bridge. There are 5 levels of the Upper World: Stone, Plant, Animal, Human and ***. This last one really doesn't have a name per se, as it is the ultimate experience of the soul.
Shaman are capable of journeying to all 3 worlds, and all 5 levels of the Upper World, where they have access to all knowledge, teachings and healings.