He'll probably answer a letter with a brief comment, at least an e-letter. If not, you can go to his site and ask for a consultation, but you have some questions about his "credentials." But to take that route, it would be fair to pay him for his time. I am certain he would bill you for it.
Try the casual curious e-letter approach first. Just don't expect a detailed answer for free because a bunch of us former cult whackos probably try to get free counseling from him.
I personally could not stop at simply examining JW doctrine without looking to their alleged source, the Bible. Once I saw how that was from men, I was able to go the next step and see what science has to say.
But this board is full of people who didn't do that, many of them with college educations. But where you and I say they might have some left-over cognitive dissonance, they try to say we have some left-over bitterness toward God over letting us be in the cult to begin with. So, it's one of those never-ending heated debates.
Steve is just one guy. Try learning about what other modern psychology people believe and why they believe it. That'll keep you busy. Hassan is not THE expert on this, just one of them that came out of the trenches that we can relate to better.