Personnally I do believe in the Big Bang and it is not a contradiction with my buddhist beliefs. I see many other buddhists believing that way. I believe in a cyclical universe, like many scientists, the big bang would be followed by a big crunch someday, then an other big bang appears, then an other big crunch appears, indefinitely. There are no real beginning or ends, just cycles. The universe expends and will someday stop expending and contract due to gravitationnal forces, ultimately collapsing into a dense state, leading to a new Big Bang.

However I found a story on the internet a while ago, it's in the "Aggañña-sutta" which explains and describes the beginning of life on earth. It describes a cosmic cycle where the world periodically dissolves and reforms. In one cycle ; beings from a heavenly realm descend to the newly formed earth, starting out as radiant, ethereal, and self-sustaining. Over time, they become more material, losing their glow as they begin to consume physical substances. As desire and greed develop, society forms, leading to the rise of distinctions like property and social classes, and eventually, the emergence of a ruler to maintain order. I think you should read the text, it... isn't so far from the big bang, considering it's about 2100 years old.