To me it makes most sense to think that existence, and human consciousness, are the result of the intention of a supreme being who is outside of time and space.
To argue against the (highly speculative) scientific models of origins of space/time and matter/energy by asserting a complex deity with intention and will existing without existence in space/time matter/energy you are not just being speculative you are compounding that speculation with projections of a highly derivative Judeo/Christian conceptionualization that evolved some 13 billion years later. We know much about how religions evolved from simple animistic, totemic attempts to control the environment to more elaborate philosophical ones through millennia of human ingenuity and imagination.
IOW though we don't presently know, and may never know, exactly what mechanism spawned the spark of the physical universe (or even if that is a valid question), we do know what it couldn't have been. It's like supposing the military success of Assyrians to their having F16s.