What's Outside? A new question about everything.

A blood cell is small and inside your body is an uncountable number of them . Humans are tiny compared to the seemingly endless outer space. What if we make up a cell inside the body of a creature, We'll call that creature god. What if inside us we have very small universes so small they cant be detected. Like us if you zoomed out into space far enough we would be too small to be detected. What is outside of space? can it really be endless? Or, are we inside something or in someone? When the body dies do we all die?