Can you agree with my idea of this hidden message in the Bible?

I have heard this theory before that mankind formerly lived in Heaven and we are the fallen ones. But, I think that is wrong. Genesis tell us that God created man and woman and they fell after they were created. Satan for sure is the accuser because he wants us to turn from God and follow him so we will give him glory. I think the preacher from the Shepherd Chapel preachers this teaching,