In the biblical world, the most important aspect of creation was that God brought order from disorder, and the order that was brought forth from chaos had to be maintained day by day, moment by moment. That's what Genesis 1 is about.
Regarding the humans' sin in Genesis 3, John Walton writes,
"Genesis 3 is more about the encroachment of disorder (brought about by sin) into a world that was in the process of being ordered than it is about the first sin. It is about how humanity lost access to the presence of God when its representatives tragically declared their independence from their Creator. It is more focused literarily and theologically on how corporate humanity is distanced from God—alienation—than on the sinful state of each human being (with no intention of diminishing the latter fact).
"The world before the fall was a combination of order and nonorder combined with a strategy to continue bringing order. This progress toward order, however, was set back by the entrance of disorder. The serpent, as a chaos creature, was part of the non-ordered world. Its interference, however, launched disorder when humanity decided to make itself the source and center of wisdom and order. Furthermore, the consequence of humanity’s role as the source and center of wisdom was not true order centered on them but disorder in which sin reigned because people are incapable of establishing order on their own with themselves at the center. The disorder this introduced extended to all people of all time, as well as to the cosmos. Moreover, life in God’s presence was forfeited.
"Therefore, first of all, in the OT people understood that they lived in a world characterized in part by nonorder because the world remained in the process of being ordered. This process, of course, was hampered by the fall because humans have not fulfilled the role for which they were created. This nonorder continues to be reflected in natural disasters, disease, and pain, among many other things. Sin is not the cause of all of the aspects of the situation, but these elements of nonorder demonstrate the human inability to enforce order within creation.
"Second, the people of the OT understood the world as characterized by order because creation established order. Humans have brought the benefits of order throughout history through discovery, invention, technology, and industry. These very same human advances that brought order, however, frequently also brought disorder. Too often we follow the guide of our own selfish ends (ourselves at the center of order) rather than recognizing that we are stewards of sacred space.
"Consequently, and third, the Israelites also recognized that they lived in a world characterized by disorder. This disorder is found in the ways we harm one another as well as harm ourselves (and the environment). Disorder is the result of sin, and it continues to reflect our inability to be as good as we were designed to be. We are but a caricature of what God intended."