The Kalam argument of first cause/cosmological goes back to Aristotle, through Aquinas to Craig and has been thoroughly debunked.
I suggest have a look at Aquinas Five ways/ Five proofs [for the existence of god]
Hint; if everything has a cause,what caused the first cause.? To claim it is exempt from cause is a special pleading fallacy.
One can also argue that the statement ‘everything has a cause’ is a claim, not a statement of fact. IE we really don’t know if that claim is true.