I actually explored some of the Swedenborgian stuff long ago.
I went to a few meetings at a church during my exploration days.
Basically, Swedenborg was another "mystic", who dreamed up an entire Kosmos in his imagination, and then all these other folks believe all this stuff from his imagination is objective reality.
Sort of like if you took Dante literally.
I didn't find them too culty.
They are folks that seem enjoy debating and talking about Theology.
I even questioned some fundamental aspects of the bible at one meeting, and the head church guy didn't mind, although i recall one guy saying what i said was blasphemy.
I do recall there were some little old ladies there, who were totally into this Swedenborgian Heaven-Hell Angel stuff, and that was pretty cute.