I would start thinking about how a conversation with God would go like. How an infinite, omnipotent consciousness that willed all of creation into existence would interact with one of His creations that was capable of knowing about Him (but not truly knowing Him, because a finite mind cannot possibly know what it's like to be in the mind of infinite God). How could such communication even take place?
After trying to wrap my head around that, I'd think about the topics God and I would discuss. The introductory "small talk" would be why I was created and what my individual purpose was (just me, not humanity as a whole). After that's out of the way, I'd ask about the decision to create a universe the way we have it and the reasons for creating the laws and constants of the universe the way they are (like why four fundamental forces; why not three, or seven, or 15). Why create a universe where the conditions were set up for us to have this biological structure? Why not create a different kind of universe with different conditions that would result in a different kind of conscious life?
Then I'd ask about the decision to create beings with consciousness capable of comprehending so much that does not concern its immediate existence and survival, and the wisdom behind allowing free will when it risks so much destruction. This would diverge into topics of divine decree and morals, and how certain divine decisions are justified, given all of the known variables of creation at all possible times.
Then I'd ask about the nature of the soul and consciousness. The reason for creating us this way when we could have been created as automatons, blissfully unaware of reality, just following our programmed instincts to the letter, like every other living creature that we know of. I'd ask about the mechanics of the soul and how it functionally relates to consciousness.
I would ask God why create anything at all, why not just... Be. Infinitely just Be. God is infinite potential that is made manifest at will, so why will any of it into existence? Why instantiate reality at all?
Then after realizing that I may very well not learn the answers to any of these questions, partly due to the fact that some of answers may effectively be incomprehensible for a mortal, finite mind, I would be deeply saddened and wait for my heart to stop beating.