I just came out to my wife a couple months ago, so I know exactly where you're at. My dysphoria was bad, but keeping it from her was making it much, much worse.
I did quite a lot of reading on the subject and tried really hard to prep for it, because as difficult as dysphoria is, I wasn't willing to lose my family over it. I even started
this thread here on Susans and got a lot of very good advice (you may want to read through it).
Ultimately I have three bits of advice to pass along to you.
You've had years to come to terms with who you are. And it probably took a long time for you to accept yourself. But this will all be brand new to your wife. And regardless of her experience in social work, it has never happened
to her. So
give her time to come to terms with her own feelings about it. As Jill said, she won't like it at first. There will be tears, anger, and likely feelings of betrayal. Those are normal. But if you're willing to work it out together, you stand a much better chance of her coming to acceptance.
I also learned that in the initial coming out, there is a fine line between full disclosure and TMI. Get the ball rolling, and then answer questions. But save the intimate details for later...when she's ready for them.
And perhaps the biggest piece of advice I can give is that, if you plan to keep the marriage intact, you can't throw down ultimatums and
inform her of your decisions. This is a something I've identified as one of the key differences between those who saved the marriage and those who lost theirs. If you want a partner in transition, you'll need to treat her as such. Ultimately you're the one making decisions for you, but she'll be be more likely to go with you on it if she feels like she has a part in the decision-making process.
I wish you the best! And definitely let us know how it goes.