The first argument for believing in the existence of some kind of personal supernatural being, be He male or female, universal or tribal, embodied in nature locally or transcendent to all of nature, is the testimony of all civilizations prior to our own, through all human history at all locations.
This is an argument from authority, although it is not a fallacious argument from authority. The grading of difference between a fallacious argument from authority and a good one is the grading of how much we have reason to believe the authority.
For example, when a mother reproves her child for touching the stove, "Stop, you'll get burned!", she is making an argument from authority, her own authority, without giving reasons to believe her. But it is a reliable argument, because it is her realm of expertise and responsibility. If she (an uneducated person of limited experience) were to pronounce on international politics, it would be a fallacious argument of authority for the child to repeat what mom said with the reason that "Mom said so."
Our present era of history is the first one to ever believe (largely) that the universe is non-personal, that there is not a personal supernatural being over all and behind all. We are the newcomers.
I believe that the latter claim is a matter of ordinary accepted fact, and I won't try to prove it, although it might need to be proven. The main former claim is the important one, that all human history accepts that there is a personal being or supernature behind all nature.
My sources: I first heard this argument from C.S. Lewis, Mere Christianity. It has become my own.