Okay, so how did the whole Adam and Eve thing work to build the human race without incest?
Adam and Eve are stand ins for early humans. This worked to fit a narrative God wanted to tell a primitive people. The literal truth would have been too confusing and probably beyond their comprehension.
If we advance to the story of Cain and Abel, Cain kills Abel. Cain then tells God that whoever finds Cain will kill Cain. But according to the Bible, we only have 3 humans alive at that moment. Adam, Eve, and Cain. Then immediately, Cain gets married to a woman not previously married. Where did she come from?
Leave it be. Ronnie answered you twice.