Given that there is something and something cannot come from nothing, there can have been no beginning.
Given that there is something and something cannot turn into nothing, there can be no end.
There has to be either something or nothing.
There cannot be nothing because there would be nowhere for there to be nothing.
There cannot be nothing because there is something and something cannot become nothing.
You cannot say there was a god who created something from nothing, because if there was a god then there was something. A god would be something. There was never nothing.
Something cannot become nothing but something can become something else.
We are part of the ever-changing something that always was and ever shall be.
This is the something that there is.
There is no nothing.