On your first point, this is likely to end up in one of those frequently encountered verbal/rational discussions which lead nowhere (unless one has had the experience you refer to). However, if something is a realization without being an experience, who or what is making that judgment? Presumably a consciousness which thinks it has had that experience.

On your second point, I didn't mention “the idea of various levels of reality” in my list of things of which I am 100% certain. The closest I got was to say that the sleep/dream world is a different type of reality, but nevertheless one which I experience while still being an apparent consciousness inhabiting a body.

That I am consciousness is an (as I said apparent) experience, not 'information'.

I may well be dreaming now, and various traditions would say I am and can therefore be discarded according to the rules of our current discussion. But that would be a different type of dream experience from those encountered while sleeping.