The quote about a day with God being as a thousand years was written at a time when few had any concept of millions, let alone billions. The days seem to describe what we humans refer to as ages. The important thing is that God started it all in motion, whether billions of years ago, or less than ten thousand. Your belief system may vary, that’s your right.
Hence the problem with literal interpretation of Old Testament stories that are thousands of years old and passed through barbs and word of mouth for the majority of their existence. Also why, while I am a Christian, I am not an Evangelical.
I think I read somewhere that the term “day” and “age” are the same in the Hebrew used in the Old Testament. As an earth scientist it is fairly evident that we live on an old earth. Also as a scientist, it is fairly evident that it didn’t “just happen” by chance.
I always find it interesting how close the Genesis account fits with today’s science. There was a progression to Creation - and it came out of nothing. But it didn’t happen all at once.