Perhaps we can sum up by saying there is something which exists, because we exist.
Perhaps not: but it is your claim so you demonstrate it.
"That which exists" is beyond human comprehension, and we may call it God, because it must be the source of all existence.
If this thing is 'beyond human comprehension' then you clearly can say nothing meaningful about it, so it might as well not exist.
The question to ponder is the relationship between "that which exists" and us.
Which is begging the question - a fallacy.
In our universe, there is much which exists which by its material nature is unable to ponder its existence and reasons behind existence.
Who can say for sure, but you're begging the question again, so your point is pointless.
It would appear that humans have an apparently unique attribute in this respect compared to other known matter in the universe.
The universe is a big place, Alan, so if I were you I'd reserve judgement.
So the question to ponder is : why are we able to contemplate our existence, and where in a material world does this attribute originate?
That doesn't take much pondering Alan: it is just active biology (brains to be more precise).