I am on vacation for a couple of weeks. In the meantime, I have some homework for you.
Although the book of Genesis is located at the beginning of the Bible, scholars don't believe it was actually written first. Most think that the book of Job is the oldest book of the Bible. Based on certain features of the book, they generally date it to the Patriarchal era (the time of Abraham).
With that in mind, I would encourage you to read the latter portions of Job and take note of the vast amount of creation-related material contained in there. Remember, this was the Jewish view of creation long before Moses came up with the "seven day" construct.
May I humbly suggest that the Bible's most foundational understanding of itself is not about the age of the earth? It is primarily about understanding the Creator in light of His creation.
Just try it. See what you think.