(3) What we know as Kabbalah today started in 13th century Spain with Rav Isaac Luria.
(1) If you’re looking for someone in a relationship with “Yahweh,”, I recommend proverbs 3:19; there is a school of thought that has Chachmah (wisdom) as a personification, and that she was the project manager for creation This is to say that a female entity had a relationship with the big guy and was necessary for creation. Do I believe that? I don’t know. But I liked the idea so much that I made her (Chachmah as Sophia (wisdom in Greek) the narrator of my novel Scapegoats: The Goat Protocols about how the scapegoats’ in Leviticus decide to form a union to deal with the excessive load of sin they are forced to bear.
(2) It’s really people who are doing the emanating
BTW I hope y’all know that the study of Kabballah can be dangerous unless you are over 40, married, and have children.