The Principle of Contingent Causation: The Impossibility of Infinite Regress.

[Bucky Ball]

There is no reason to posit any sort of First Cause UNTIL we have some data from the environment EXTERNAL to this universe. 
All you're doing is slapping a principle you think you know from a tiny part of this universe onto an environment you know absolutely nothing about.
There is no reason to consider ANY origin theories until there is data.

I understand that what you say is an inevitable conclusion from your metaphysical beliefs.

Those who hold to Neoplatonic, Vedantic, or Buddhist metaphysics disagree with you.

Nope. 
I have no metaphysical beliefs,
and you don't get to tell me what I believe.
The most you get to do, is say that in YOUR belief system, you interpret what I say, in YOUR worldview, in a certain way.