Sorry Bg but I am not a JW apologist but would like one to answer as well!
The Bible is not a factual treatise on how things came about, it is instead an innocent story for illiterate people. It was based on universal assumptions that were culturally shared such as the idea that gods existed in the heavens; a superior place but similar to the 'mundane' realm of Earth and responsible for all events and tragedies down here. Genesis (which was borrowed from Egyptian sources) was written from ignorance of realities but a fair and believable guess for its time.
However to believe it now would be stupid and that includes thinking there is a spirit creator who created an invisible son.
Get with it people we are dealing with myths, it was only the Roman Catholic church which selected the texts and demanded that people should regard them as sacred.