If God exists, then he existed during the first second of the big bang, he/she did not come into existance after the big bang. Therefore all subsequent happenings are irrelevant. There is a tendency to try and complicate the question of God, which does not help understanding. A little like trying to teach calculus to a four year old. So I would suggest sticking to one plus one is a good start. So what do we know about the Big Bang? We know it happened, and if we are happy to believe Stephen Hawking then there was no time before that event. Knowing that an event requires a cause, Prof. Hawking has been trying to find a way of having a physical effect which would be the cause for the Big Bang. He has been stuck on this for quite a few years.

Many people have come up with hypothesis' ranging from bouncing universe, a relatively modern idea but rather spoilt by the discovery that the universe is expanding at an accelerating speed, rather than slowing down.

It would seem that there can be no natural cause for the big bang, which since we appear to be here, only leaves a supernatural cause. So God exists, and looking at the Old Testament, he told the Jews that his name is "He, who is". A being outside of time. This therefore does tie in with what we can intuit.

Once you have a clear grasp of basics, you can move on to the complexity of today.