Scripture is the written word of God, evident throughout the Bible, one prime example where this is taught being Psalm 119. Jesus is the Word of God made flesh. God’s final word to us, the fulfillment of the written word. So it ends up that in order to understand the story, we need to see the end that’s in view. It’s fine to start with Genesis and proceed on, and let it unfold, in fact, good. But a Christian reading of scripture will start with Jesus himself, God’s revelation in him, and will see all of scripture from that perspective.
All of scripture ends up pointing to Jesus, so in retrospect we need to look back at all of scripture from what we understand of Jesus. Does this answer all of our questions? Surely not. But it does help us end up in a good place as we see what God’s goal was all along, put into effect through Abraham and Israel. Fulfilled in Jesus the Messiah, God’s Son our Savior and the Savior of the world. God’s word to us and for this weary world.