According to scientific theories, the universe began with a Big Bang around 13.8 billion years ago. At the moment of the Big Bang, all matter in the universe was concentrated in an extremely hot and dense point, which then rapidly expanded and cooled, eventually forming the stars, galaxies, and other structures that we see in the universe today. This theory is supported by a range of observational evidence, including the cosmic microwave background radiation, the abundance of light elements, and the large-scale distribution of galaxies. While there are still many open questions and uncertainties about the exact details of the early universe, the Big Bang theory remains the most widely accepted scientific explanation for the origins of the universe.
Anything else we say about the singularity that preceded the big bang, or where the energy came from, or how exactly did it happen, is nothing more than speculation. If you project your god entity to that event, well that's your prerogative, you can believe whatever you want, but there is no conclusive evidence that the big bang was "triggered" by your Christian deity or any other divine being. We simply don't know yet, and to pretend that you do, is to delude yourself.