There's "a beginning" , but it was not "the beginning"
I do believe that God is eternal, no beginning, no end.
There's "a beginning", but it was not "the beginning".
Experientially this is true, you can investigate it and analyse it.
Before you were born, there was nothing. Then, "a beginning". It was not "the beginning". After you die, "an ending". But not "the ending".
All beginnings and endings then is not the beginning and ending.
He did not create himself, because that implies "the beginning".
He is .. what is. It is a terrible thing. To not be able to escape the "prison of existence". I suspect that is why we should count death as a blessing and not grasp for immortality.
Death too, is love in that it implies a new beginning. Fresh experience. To behold the mysteries of the universe, as fresh and new once more.
God has but one flaw, it is said. He is unlimited. But it is not true. He is limited, in us. Creation needs God, and God needs creation. One is not complete without the other.
Which is why I find the idea of trying to "become God" or even claiming to be God such an appalling thing to contemplate.
God might be me, but I am not God. Existence is love, it is said. And it is true. God does love us. Love is the one thing that makes eternity bearable.
But we should also love him, for all he gives us. The magnificent solution to this unsolvable problem which is eternity and infinity, we call "the universe".
His being.