You haven't defined "god". Unless god = energy then this particular line of reasoning does not hold.

What energy actually is, is energy. There is no reason to call it something else -- and certainly not god.

The universe / existence / everything is adequately described by those terms; adding god to the list of synonyms does not clarify anything. Indeed, when theists do this, they are usually using it as a Trojan Horse to sneak in a generic god and then pivot to their specific god of choice.

The universe is everything and that doesn't make it nothing, so I think we can be sure that everything is not nothing.