In my quest to find out from Christians what God is made of, I have been told that God is everything.
This is essentially pantheism: the belief that God and the universe are identical. Unfortunately, this view is incompatible with Christianity, which posits the existence of a personal, anthropomorphic god.
Clouds do not answer prayer. Stones do not create. Oceans do not love. These qualities are the domain of animals with intelligent brains. No surprise, then, that we have given our gods the same properties as ourselves. Once we have done so, however, pantheism fails as an explanation for what God is made of.