[dleviwing]

OK Mikey (MJA);
Let’s look at your analogy. The physics of rain to rivers is actually the evaporation of sources of water like lakes, ponds, and oceans that result in clouds that drop the rain when they become saturated or are pushed over higher elevations wind and then gravity pulls the droplets down.

Taking that analogy we can say that throughout the vastness of an infinite void are pools or sources of a fundamental substance needed to produce a universe. With this analogy the universe is the cloud of substance and structured matter particles are the raindrops that make the rivers of galaxies.

Now with rain we have the Sun that provides the mechanism of evaporation; what do we have to convert the sources of fundamental stuff to clouds of universe and matter? What is the nature of this fundamental stuff that it can do such a thing?

Maybe it was the consciousness of the stuff that caused it as Michael suggests.