If Occam's razor can be validly invoked here, then it is quite simple to demonstrate the reality of this world without having to assume that God exists, which is the claim you've been disputing all along here. Either there is a real world which we perceive and live in, or there is an illusory world which we perceive, and somebody or something which produces this illusion through unknown causes for unknown reasons; Occam's razor says the latter thesis introduces too many complexities, therefore we perceive and live in a real world.
But I was not suggesting "self-causation" as an alternative to your assumptions/deductions. I said that you could not assume that your existence was an effect, and so required a cause, rather than being something uncaused; and that you could not assume that there was some law of causality requiring that persons must be caused by other persons, and so your cause must be a person.
Invalid argument: you are assuming the existence of "human history," which is the thing you are attempting to prove. (And if you did want to go there, what has been empirically observed is that persons with physical bodies produced persons through physical actions, so if human history is our guide...)
You still have no reason to assume, as part of your deduction, that causes must share an essential nature with their effects
No, because if this world is my dream, it means that I dreamed up King Lear and Beethoven's 9th symphony and General Relativity, etc., etc., and this is entirely impossible.
If there are good reasons for thinking we live in an objective reality (see above), and no good reasons for doubting it, then "hope" doesn't enter into it.
This sounds as if you were saying that your act of deduction springs God from his imprisonment in conceptual space and causes him to pop into reality space ("brings Him into things that exist"), but obviously that can't be what you mean. I can't see what you do mean, however. That if you deduce that you were created by a person, it follows that this person also created everything you think of as real? No, it doesn't follow. It doesn't at all follow.
Let's try to keep it simple. Assume for the sake of argument that you've established "I was brought into existence by a person." What's the next step?
If I was brought into existence by a person, then B follows.
If B, then C follows.
If C, then the things we think of as real, are in fact real.
Again, "I see things; if my creator is a person, then he sees things" does not at all imply "he must be seeing the same things I am seeing, therefore the things I am seeing are real." Nowhere close.
As Occam's razor is generally summarized, it's "don't multiply entities without necessity." You don't know enough about the ultimate ontology of the universe to be able to say whether multiple creators are or are not necessary. Certainly at this stage of your deductions you haven't established anything which would let you say, one way or another.
Moreover, you aren't addressing the possibility that the person who created you is in fact the source of the illusions you are experiencing, including the illusion of an all-good YHVH who would never deceive you or permit you to be deceived.
Here are two answer to the question, "how do we know the world we seem to inhabit is real?"
Argument 1: I cannot recall events before a certain time; therefore I was created around that time; since I am a person, my creator must be a person; since people observe things, both my creator and myself observe things; I observe what seems to be a big world full of stars, people, etc., etc., so my creator also observes what seems to be a big world full of stars, people, etc., etc.; if the same thing is observed by two different people, it is likely real; therefore the world of stars and people is real.
Argument 2: If it seems to be a big, real world, likely it is a big, real world.
If our criteria is, "the simple answer is usually the right one," which is the better answer?
See above, to coin a phrase.
An omnipotent being can irresistibly implant the conviction that he is trustworthy, even if he is in fact a deceiver. Are you disputing this? If not, it makes no sense to say his trustworthiness is something which you can validly prove over time. All the "proofs" could be irresistibly implanted illusions.