The Jews refer to the first five books of the Bible as the Torah. Torah is commonly taken to mean “law” but the Jews resolutely point out that the word means “instruction.”
So, the Jews are a step or two ahead of Christians in making a clear distinction about the contents of those books of the Bible.
From the standpoint of archeology, nothing in the Bible can authenticated until the time of King David. And, then, they have only found some piece of pottery or rock that refers to David’s house, or something like that.
From the standpoint of biology and DNA analysis, modern Jews and other Palestinians are genetically indistinguishable, it is said. That runs counter to the general upshot of the OT history, that Abraham and his descendents came down to Canaan to live among an existing people.
A lot of scholarship puts the writing or re-writing of the Torah at somewhere around the time of the second Temple. Some of the Torah is very ancient, based on names of God, people, and places which are not found in later periods.
There are subtle inconsistencies in the Torah which suggest that parts of it were written by different scribes perhaps in different times according to different traditions, but later integrated without much attempt to smooth over the inconsistencies.
The Dead Sea scrolls are the oldest manuscripts of the Old Testament. The Septuagint in Greek was composed later (as I recall reading), and the text used by the Jews today is the Masoretic text, whose copy is dated to somewhere in the eighth century AD (or CE).
The first creation account, in Genesis Chapter 1, is a very poetic construction, very carefully arranged. Even in English you can see the repetition of words and the emphasis on the use of the number seven, e.g. seven days of creation.
But, in Hebrew, the verses are composed of seven words or multiples of seven words.
Seven is the number of days for anything important that occured in the ancient times. It would have been unbelievable or unseemly for creation to have been anything but seven days. Weddings, funerals, coronations, parties (see Esther), etc. were seven days duration. It took so long to travel, a one-day wedding would have been unthinkable, for example.
The second account of creation starting in Gen Chap 2 is so different from the first, you have to throw away your pencil assuming that these accounts are literal. They’re something else. They’re Torah. They’re instruction.