The introduction at this stage of the concepts of night and day is also ignored. For 'day' we of course understand an age of indeterminate length. Day 2. is more difficult. Precisely where or what the 'waters' are now is not clear. It is assumed that the lower 'waters' refer to the Earth, the space to the sky - since the firmament has, in due course, to accommodate the stars it would appear to equate to the cosmos.
Opinions differ as the upper waters.
Some ignore the firmament and say that the upper waters are everything left over in the immediate area when the earth solidified, others that the upper waters formed a haze in the atmosphere that obscured the sun. You will recall of course that in the Flood story it was water from above the firmament that contributed so much - never mind, worry about that when we get there. Day 3. is not without its problems either. The observed fact that grass and flowering or fruiting trees did not appear until much later is countered by a claim that the creation of plant life only started on the third day, and continued throughout the subsequent days. Ignore for now the question of how any plant life could grow without sunlight.