How does all of that "prove God"? It is true that the universe has a beginning, and this fact is supported by scientific evidence like cosmic microwave background radiation and redshift. However, this does not prove the existence of God. Roger Penrose, a Noble Prize-winning physicist believes the universe is cyclical:
Before the "big bang" of our universe, there was another univese and another big bang for that universe. Where is your personal God?
You also cited the First Law of Thermodynamics and quantum mechanics to support your claim. The First Law of Thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another. Perhaps that "form" is a univese. One universe to another, hence how does that prove the existence of your personal God entity? It doesn't.
Quantum mechanics, on the other hand, has been arguing that a closed universe can spontaneously appear out of a quantum field or "foam", of probabilities. Some call that "nothing", I don't see how that is absolutely "nothing". That quantum field might be the source of all power, energy, laws..etc. Where is your personal bible God there? Not there.
You also cited Friedmann's solutions to Einstein's field equations. However, these equations are mathematical models that describe the behavior of the universe. They do not necessarily prove the existence of any God, much less the biblical one. So again, you're back to square one. You haven't presented any conclusive evidence yet for the existence of a God.
So far you've failed to provide any evidence to support the notion that God created the universe. Good luck next time, keep trying.