I hope you don't mind my welcoming you with a comment or two. I know this section is supposed to be from SO's. I am on the other side of that.
I think it is great you are researching and trying to find out information. Some people just bury their heads or freeze up. I am so sorry you had to experience this. It is sometimes a surprise to us to come to the trans realization and we often have years leading up to it. It is often with shame and fear that we come out to our spouses(when married). This was true for me too. To get to a point where the spouse is informed can be overwhelming and frightening for them(you). Communications is very important, as you probably realized.
It is great that you are in therapy too. Whatever journey your husband takes, you are both humans. Trans or otherwise, we humans go through good and bad times. Therapy helps us move through life more smoothly, with swings that are not too extreme.
There are many people who do not have to transition fully to live a full and happy life. With patience and understanding I hope you two can work through that. It will be tough at times(life is and trans life can add to that).
Please feel free to continue to ask questions. I hope your journey smooths out.
With warmth,
Joanna