In the beginning, God created the Earth over the course of precisely six days,

MYTHOLOGY IS NOT REALITY. Bronze Age myths should not pervert actual scientific discoveries and the education gained from them.
"God" is a figment of one's mind, brought about by wilful self-hypnosis and being deceived by others. What a bunch of pre-scientific writers composed over the course of centuries (which explains a significant proportion of the countless contradictions) should never be taken as fact, especially when most of their ramblings just do not make any logical sense whatsoever.

The Earth was not "created" by any seemingly omnipresent (why can't "he" be objectively, scientifically measured?), omniscient (why couldn't "he" provide answers as to how to cure illnesses? Why do we have to discover such things ourselves?), omnipotent (why couldn't "he" defeat iron chariots?) being. The Earth was formed after the Sun was formed, as a result of remaining matter compacting together and being made spherical due to gravity. At first, it was very volcanic and hot, with absolutely no life whatsoever - only basic chemical reactions. These reactions eventually changed into RNA and anaerobic protoplasms, which produced oxygen as a waste product. This eventually allowed aerobic life to be possible.
Water likely came from comets and meteors impacting the young Earth (which might have also caused the existence of the Moon), and there's never been anywhere near enough water to cover the entire planet.
Aerobic life originated in the seas, as far as we can tell, but the unguided process of evolution (which has no 'end goal', by the way, and really every species is 'transitional') eventually allowed some aquatic species to venture onto land while other species died out for various reasons.

No invisible being from outside our reality (and thus by definition is 'unreal', not real, make-believe) ever existed, nor is one wanted.
All such a make-believe being does is lower educational standards (look at the southern United States, like Texas) and cause needless divide between logical people who will revise their knowledge of how things work should their current perception be objectively proven incorrect, and those illogical people who foolishly stick to Bronze Age mythicism even when it's been objectively proven wrong on every count (scientifically, morally, historically, paleontologically, archeologically, etc.) an uncountable number of times.