But if God exists because He is the Ultimate Reality, then you have another problem: you have proven that God exists, but you haven't proven that God is, in fact, God. All your argument proves is that reality exists and that you call reality "God." However, reality isn't omnipotent, omniscient, omnipresent, omnibenevolent, or supernatural. In fact, reality isn't even a person. All you're doing is calling reality "God." That would be like me calling my computer "Bilbo Baggins." Yes, it would be impossible for anyone to deny that my computer exists because I'm typing this comment on it. Therefore, Bilbo Baggins exists. However, if this argument is valid, then Bilbo Baggins ceases to be Bilbo Baggins and is just a computer. Your argument that God is the Ultimate Reality does the same thing. It doesn't prove that God exists. All is does is call something "God" that isn't God.
Look, I agree with you that God is real. However, no one is going to be convinced by this because it is so obvious what you're doing. There are legitimate reasons to believe in God. Why don't you use those instead of an argument centered around a logical fallacy?