My belief is a bit different,
I believe that God created the big bang, and made it just right for all the planets, stars, galaxies and life etc. to form. He got earth just right all through the big bang to produce life, and is more of an energy or being beyond our comprehension. I believe in a different sort of heaven, that people go into a dreamstate when they die, and heaven is just their picture of a perfect world, and that the underworld is just an everlasting nightmare, caused by guilt from your actions during life.
I believe that we were all made for a purpose, but that is because there is already a pre-determined outcome for the universe, and that everyone does their minor part in it. God made us all, but not exactly like they say in church, but more that he created everything including the exact conditions for us to be here.
Idk if you would call it Christianity/Catholicism, or what, but it's what I believe.