"In a beginning God (Elohim) created the heavens and the earth. As for the earth, it came to be a chaos and vacant, and darkness was over the surface of the abyss." (Genesis 1:1)
"Elohim" means mighty ones. "Yahweh" is the formal name for the Elohim. In this beginning everything in our universe that was needed to accomplish the plan of Elohim (the mighty ones) came into existence - Science calls this event a singularity, or the "Big Bang".
"For thus says Yahweh, Creator of the the heavens; He is Elohim, the Former of the earth and its Maker, He established it; He did not create it a chaos; He formed it to be indwelt. I am Yahweh, and there is no other." (Isaiah 45:15)
The original earth was created to be inhabited, yet the Bible says it became a vacant chaos.
“As for the earth, it came to be a chaos and vacant, and darkness was over the surface of the abyss." (Genesis 1:2)
That is all we are told about that period of time, the first age. Apparently, heavenly beings (angels) were created either before or after the Big Bang and some were given dominion over the original earth and all other planets in the universe. My view is that these angles rebelled against Yahweh resulting in the planets of the universe becoming the vacant chaos. I think is rebellion is the "disruption of the world" spoken of in the book of Ephesians.
"Blessed be the God and Father of our Lord Jesus Christ, Who blesses us with every spiritual blessing among the heavens, in Christ, according as He chooses us in Him before the disruption of the world..." (Ephesians 1:3-4)