Im going to restate a question that I've asked twice now. What is your source of information? Who has given you all this supposed knowledge on the inner workings of the soul? According to you, souls that have been separated from the body (presumably the only souls that can remember being heaven, hell, or purgatory) can't speak with us physical beings to corroborate anything you're saying on the subject. As far as I can tell you have a lot of "answers" but zero proof.
I'm talking about metaphysical matters.
What kind of proof or evidence are you talking about? Mathematical? Logical? Scientific?
Are you talking about scientific proof or evidence when you say the scientific method is applicable to metaphysics?
Where did you get this information?
The very scientific method is supposed to be only applied to the physical world, just like an ordinary tool (hammer or screwdriver). I don't know if you're aware of that but you're applying a strange metaphysical interpretation upon science. You say science is the only way to get knowledge and scientific method is applicable to metaphysics. Nowhere in science there are such statements.
In fact you are following a philosophical system called positivism. Idk if you're aware of that or if you don't know what the scientific method is or what metaphysics is. Probably you're just a blind follower of positivism (lately it's spreading like a plague).
Do you base your life in science? Science is just a tool and try to view it as a golden calf will just bring you more disappointment (just like the JW disappointment). Because your life needs to be guided by a metaphysical principle and not by a hammer.
The scientific method is a philosophical system and metaphysics is also. Everything I said is subject to philosophical study since the dawn of man. And the test of it is time. Nature itself "hates" waste. If something is not true it will never last too much time. My view is standing for thousands years throughout many civilizations. Your view is just a little shadow in the stream of time. No matter how hard you try you simply can't change this fact.
Giving a more direct answer to your question I get my information through philosophical inquiry and through metaphysical revelation (both public and private) brought by non human beings (human souls can't do that without special permission) and through the test of time/history.