Actually, I think you are a literate person, and I’ve a whole string of posts from you to prove it.
You know what the plain sense of a story is. What a paragraph is. What a sentence is.
Christian theology must begin as biblical theology. It’s only after you do that work that you can branch into interpretation.
That’s no different than any other interpretive task with any other writing.
I also know impossibility of the Book of Genesis being a first-hand account of events.