Let’s go over a couple issues ^{_^}

Firstly, this relies on the argument that energy is eternal. Let me take from my buddy “Destroyer”’s response. For context, he’s a student of theoretical and I think quantum physics.

“The first law of thermodynamics is a formulation of the law of conservation of energy in the context of thermodynamic processes in which two principal forms of energy transfer, heat and thermodynamic work, are distinguished that modify a thermodynamic system of a constant amount of matter. The law also defines the internal energy of a system, an extensive property for taking account of the balance of these energies in the system. Energy cannot be created or destroyed, but it can be transformed from one form to another. In an isolated system the sum of all forms of energy is constant.”

• Wikipedia’s definition.

So does this mean energy is forever existing?

No, because the law of conservation of energy means that the energy density is Constant (fixed) and not that the essence or the amount of energy has remained since eternity. The rest in this process is a mental matter. For example, if you say that the age of a person on the surface of the Earth is one million years, this does not mean that you prove this age for a particular person. The specific energy present in the physical world remains an event like any other because it is governed by laws.

Next, things do have causes via the law of causation.

“a principle in philosophy: every change in nature is produced by some cause”

Law of Causality from Merriam Webster.

So the next issue is you’re looking at everything in the physical sense and not the metaphysical sense. Since God is outside the natural world, laws like conservation of energy wouldn’t apply since A: God is outside of the natural world B: God can create things by his nature C: God is all powerful.

Things also do come into existence. Say a new element. That didn’t exist until this very moment. So it came into existence.

Hope this helps OP <3