A philosophical question I just thought of.?

How was this universe made? If there is god, Which I do believe in, then where did he or she come from? Who made he or she, and who gave them their powers? If you by science, still this universe is UN-explainable. The Big Bang theory states that the universe started from one single point of origin, and started expanding endlessly. where did all this matter come from? Who made it? Who made the elements, and this universe? Are there other parallel universes we don't know about? Who is god, why did he make the universe? And what gave and still gives god his power. he must've Been "Born" to some degree. Before the universe their was nothing. who created this nothingness? Who created god? And if god is a figment of the mind, then scientifically, what events made this universe, and why? What is the eternal force behind god and where did it come from? and who or what created that? What makes this universe possible? There has to be something behind god that we don't know about. If god was the first, then that means their was nothing, or no one before god. If there was nothing or no one before god, then where did god come from? Nothingness over time does not turn into something, It will stay nothing for ever, so that means there was something before god, and what was that thing? Explain the origins of god, and gods maker. Explain this universe scientifically too if possible. Why are human minds limited?