Could you have a single thought without electrochemical chains? There is a purpose for them. Isn’t it? Why do you think that meaning cannot be a manifestation of electrochemical chains? Do you have an argument for that? I already argue that soul cannot process information. Do you have an objection with that?
So you agree that you inhabit a space and have a location. I am sure that you agree that you can interact locally with your body too. So here a question arises: Why do you think that you are immaterial if you are local entity and you locally interact with your body? In fact we have evidences that the Iness is produced by electrochemical chains in left part of brain.
You argued that a thing, which you called “soul”, and for which you proposed a set of characters, cannot process something you called “information”, for which you also proposed a set of characters. Though basically I cannot discuss your argument because I have no experience of anything in the world with those features, I would say that it is not impossible to conceive an entity which transduces something with shape into something without shape (though with “form”, in the aristotelian sense of the word), and back again into something with shape.
On the other hand, it is evident that “meaning” is human. And when something else (a safety signal, for example) has meaning (more precisely,
acquires meaning), it is because of the activity of human beings. If we were able to establish an accurate correlation between what happens in our brains and our thoughts, that correlation (I insist: established by us) would be precisely the human attribution of a “meaning”. Without that tremendously laborious human activity, the brain changes that you could witness somehow, would mean nothing to you nor to anybody.
We have learnt to say “my body”, “your body”, “her body”, etcetera, just like we say “my horse” or “your house”, or “her kitchen”. However, “your body” is not yours in the same sense as “your dog” is yours: whatever is happening to “your body” is happening to you. Whatever is happening to “your dog” is not happening to you. Still, immateriality (with the “meaning” that I suggested previously) is one of your peculiarities, which you don’t share with electrons, or with rocks, or…