Upon embarking upon such a quest as the origin of the universe, a demonstration of why something exists instead of nothing should be the initial presentation: either something exists or nothing exists, BUT NOTHING DOES NOT EXIST; therefore, something exists. That something is the first existent, immaterial space in the pre-universe with a capacity for becoming actual space in the current universe. It is known that actual space is a requirement for mass and that it preceded mass, the existence of which is undisputed since idealism is irrelevant and the Standard Model of quantum mechanics has been established. Immaterial space in the pre-universe became actual space in the current universe in accordance with Aristotleās view of potential and actual. Immaterial space in the pre-universal had a capacity for becoming actual space since immaterial space in the pre-universe became actual space in the current universe. Potential immaterial space became actual space (inflation preceding the big bang) liberating the energy of the big bang, originating the universe.
Perhaps God is the first existent, searched for by philosophers. I thought this natural view might be interesting to some inquirers.
Actual Space meets the Kantian transcendental requirements by being absolute, necessary and universal; therefore, space is not empirical.