That is my basic problem. I don't understand what it means to have multiple or infinite universes. It may be that there is no way to understand it outside of mathematics.
That is because everything that the currently accepted paradigm focuses on is the time and space that we can detect and our interpretations of their coexistence. Time and space are a fabric, an infinitely large and infinitely small fabric that matter and life revolve upon and reevolve upon and they are very intricately intertwined with mathematical equations. The way I like to think of it is to use a lowercase u as in universe to represent all that we can detect both inwards and outwards and an uppercase U as in Universe to represent the infinite fabric of space-time that our tiny little universe exists within. Our “Point” in space-time that we call our universe or what I would classify as our Outer Significant Relative Pocket of Space Time is one of an infinite number of such pockets of space-time each with their own unique re-EVOLutionary path though our shared fabric.