The present universe is over 13.5 billion years, give or take a few billion? How does one know? One uses one's grey matter to figure it out.
Interpretations from old books in the Bible are why we have science, which seeks verification of everything. The truth is not fully unveiled. It takes time to grow? Join humanity and verify everything. You will arrive at a mental structure that is stronger than sand.
Don't rush your best ideas. Grow them....
Arthur
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The importance of naught:
It had the biggest head you ever saw. A great enormous thing, - like nothing. A huge big -- well, like a -- I don't know -- like an enormous big nothing. A.A. Milne, "Winnie The Pooh"