I am simply seeking to understand the other side
Well my first suggestion would be to get clued up on terminology, an easy read is Gene M. Tucker's Form Criticism of the Old Testament. In it he introduces Prose and Poetry. He then goes through each type and breaks each of these down again. He discusses Genesis although not in any major depth, as it is introductory. Once you have read this you should be able to distinguish between 'poetic prose' and Poetry and you will understand the difference between them. This is an essential distinction which confuses many conservative evangelicals, i.e. they hear 'poetic' and think I am calling Genesis 1-2 Poetry where I am in fact saying it is a sub-genre of Prose.
Once you have the terminology sorted I would suggest you have a read of these commentaries, they are expensive so I would use Inter-Library Lending if I were you (as you move down they get more conservative):
Genesis by Hermann Gunkel (preview here)
Genesis by Claus Westermann
Genesis by Gordon Wenham
Genesis by John H. Walton
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