In assuming your conclusion, and even then finding problems in fully supporting it — as you say at the end of this essay — have you not just engaged in conceptual hokus-pocus? In Step Zero of this thesis you assume you are observing some phenomena arising from causes external to your self — voila! You have created the objective world. It seems to me that you need to go deeper with Kant and throw in some Schopenhauer, to wit: we are a noumena, and what does that mean? Before you create the objective world, you have to come to a definitive understanding of what a subjective being is. Modern science can’t help you because, while they probe the microscopic and macroscopic worlds, they rarely go very deep, accepting, as they do, your magical Step Zero.