Where did the universe begin?

The creation of the universe
Nothing can exist without a cause behind it.
You cannot having something from nothing.
What is the cause of the universe? What caused the physical universe to come to existence?
The Big Bang?
But what was there to cause the Big bang? The cause can’t be the effect
If the Big bang came from nothing? It has no cause, and if it has no cause, then it can’t exist. Then its magic.
What if the universe always was? If it always was, then it had no beginning, so it never started.. Well if it never started it never existed, so it never was…so its magic again.
So either the universe started from nothing and it can’t exist, or it has no beginning…then it never started., which it can’t exist.
What is the answer?