Obviously you’ve never studied the Bible otherwise you’d know God didn’t flood the earth because of Mans sin alone. He flooded it because of Genesis 6. The Nephilim and corrupted DNA. It’s why the lineages are listed in Genesis. Because Noah was perfect in his Lineage- DNA not corrupted. Jesus was born, lived Sin free- something which no man can do, and died for us. Something that was prophesied in the Old Testament and recorded way before he was actually born. There are more ancient Bible manuscripts found ALL over the earth. Thousands of fragments, all verifying that the Bible remains unchanged. Just do some research. Check out - A Case for Christ by Lee Strobel. Michael Heiser is really good too. Praying you find truth. If you really think about it, it’s the only explanation for everything we see going on today.
Maybe if you think in terms of this world that we know. Our life here is but a breath. Do you really want to risk it? The least that would happen is you find life so much more fulfilling here AND you’ll have everlasting life. Why do you think Satanist are so obsessed with trans humanism and living forever? Just look into it.
As for Adam and Eves children. https://youtu.be/82Q74N4IMBE
https://youtu.be/82Q74N4IMBE