Cedars,
Like you, before I awakened, I was chaffing at the straightjacket the Society had put me in regarding the Adam and Even story. I just could no longer believe this was a historical account. It read like a parable. And the Paul's words at Galatians 4:24 regarding the Abraham drama kept ringing in my mind, "These things are an allegory."
Philo, as well as some of the early Church Fathers, such as Origen, did not take Genesis account literally. I suspect that Ezra and other learned Jews did not either. I don't believe the Bible writers that redacted the Pentateuch together intended it to be taken literally.
I recommend reading, "The Language of God", which is a book about theistic evolution from a Christian perspective. This book also references what C.S. Lewis had to say about the Fall, so perhaps exploring his perspective too might be beneficial as well. I don't necessarily agree 100% with everything from either works, but it does offer a different viewpoint.
Upon reading the Pentateuch in the New Jerusalem Bible, along with the section notes and footnotes, Genesis finally is making more sense to me. While the Documentary Hypothesis might not be the full story as to how the Pentateuch came together, I think it is a nod in the right direction.
There are two Creation Accounts. There are two interwoven Flood stories. There are 3 stories of a Patriarch having their wife stolen by a ruler. The Cain genealogy has parallels with the Seth genealogy. Certain themes and archetypes permeate the Pentateuch, even the Old Testament in general: the younger sibling usurps the older. The number 70 comes up quite a bit! One could go on an on.
Personally, none of this precludes spiritual and moral lessons that are inspired by God, beneficial for teaching, reproving or setting things straight. I believe trying to force a historical reading onto something that was not meant to be historical has been very damaging to the faith of many.