I believe the whole of the Bible is the word of God (lowercase w -- uppercase Word of God being Jesus Christ Himself). It seems obvious to me that some parts of the bible are literal events being recorded as a history.
Some parts are deliberately meant to be imagery and allegory. Like Revelation. If you read Revelation as literal, then it sounds like a Godzilla movie. I'm pretty sure that's not the way it's going to be.
Some parts are poetry, like the Psalms.
The Song of Solomon is several different images. One is an image of the bond between Christ and His bride, the Church. It's like a double image, since it puts spiritual aspects into physical terms. Another image is of an ideal marriage between a bride and groom -- which is in itself an image of the relationship between Christ and the Church!
If I may use an allegory, I think that it's possible that sometimes something gets translated as "blue" in color when "cerulean" or "azure" would have been better words to describe the color. Pantone 15-4020 instead of Pantone 17-4139. Both are in essence, blue.
I think it's possible to lose things in translation, and at the same time, the basic and general truths of the Gospel are clear enough for us to either learn or deduce.
When I was younger, I thought of it this way: The closer you get to the edges of the Bible (the beginning or the end, the start of Genesis and the end of Revelation), maybe the more blurry it gets, maybe the less literal it might get.
Adam and Eve didn't seem to know Jesus' name, and Job didn't seem to know Jesus' name, but they knew enough to have a picture and an idea, a direction. As we get closer to the "center" of the Bible -- the Gospels, the direction gets clearer, the destination comes into view.
The very end of John, John 21:25 says "Jesus did many other things as well. If every one of them were written down, I suppose that even the whole world would not have room for the books that would be written." This means to me that there seems to be miracles Jesus did that the writers of the Gospels didn't even record!
As for creation, it seems like the events transpired in this way: first there was already earth in some sort of existence -- "formless and empty"; second, there was light; third, there was evening; fourth, there was morning. After all those happened, God says "first day". It seems like that first sunrise might have been the first day.
God exists outside of time. In Joshua 10, we read that God made the sun stand still. If we take a literal point of view, then this means that God directly intervened in the very laws of nature that He established. Literally, God stopped the sun about noon and didn't start it again for about a full day -- we had a 36 or 48 hour day!
If we take a completely literal reading of the Bible, then right there we're dealing with at least one instance of a Being who exists outside of time taking our world out of time.
So, if we are dealing with a Being powerful enough to do such a thing, then a young earth creation or a "big bang" and an evolution over billions of years (as they would appear to us), either of those becomes easier than simple for this Being to make happen. Also, since mere humans have shown that time and space are pretty much silly putty, how much more so the Creator of space and time? For me it now ceases to be an either/or situation with evolution or creationism -- now it becomes an "all of the above/any combination of the above" situation, with "maybe none of the above because it's a totally different answer that is right in front of our noses and we are just not able to see it" situation. Sort of like ultraviolet light to the naked eye.
In other words, I trust that God can and will save me, and that He can and will and has explained it enough that I can mostly understand, and He can take care of the stuff I am not able to understand.
Since John 21 tells us explicitly that Jesus did a lot of things that aren't in the Bible, not because they are lost to time but because it wasn't necessary, it's also possible that the identity of Adam and Eve's other children aren't the only things that aren't discussed in the Bible.
God is perfect. He's always going to hit a homerun; He's always going to hit a bullseye. No matter how it's presented to us.