Not at all. God's message is very simple and easy to understand. God made us to be happy with Him. We disobeyed Him and brought all sorts of trouble upon ourselves. The confusion comes in, when we try to make it into some kind of a science text. No complex thinking required. Just don't add anything that isn't there.
See above. If deeper theology is your thing, you might want to read Genesi Ad Litteram, written by Augustine about 450 AD.
Aurelius Augustinus (354–430) is often simply referred to as St. Augustine or Augustine Bishop of Hippo (the ancient name of the modern city of Annaba in Algeria). He is the preeminent Doctor of the Church according to Roman Catholicism, and is considered by Evangelical Protestants to be in the tradition of the Apostle Paul as the theological fountainhead of the Reformation teaching on salvation and grace.