A popular and often disastrous response is to ride that liberation wave for all it's worth. Unless you live in a world full of enlightened people, or it's a choice of forging ahead or pulling the plug on your life I would recommend taking things slowly.
Rule #1 - There are no rules. You do not have to do anything!
Sure, it may not be a viable option but there is a world full of options ranging from simply being able to feel free now to cross-dress to get relief, low dose HRT, living part-time as female. The list goes on. What counts is what works for you to find relief, to feel good about yourself, to find some joy in your life.
The Wife - Likely your BFF and you'd like to do all you can to keep her in your life. I believe wives have the hardest time coping. You spent 40+ years trying to sort this thing out about yourself. So far she's had about 40 Hours! You just turned her world upside down. The person she knew is NOT the person she knew. You lied. She feels betrayed. You kept this from her all this time. The list goes on. She needs time to barely grok and understand what your feelings really are. Especially how you see how she fits into the future, if at all! Remember that the Jerry Springer image rules. Even wives that are enlightened, understanding, and have first hand knowledge of GD can take a while to absorb what just hit them.
The Job - With luck, having a unique knowledge base, or proved to be invaluable you get to keep it. Otherwise figure 6 months before you loose it. Naturally for some other reason readily justifiable in these economic times. Best wait until you spend a significant portion of your time outside of work being out in the real world as the real you. When you are sure you can do full-time. Feel comfortable presenting as a woman. Get expensive things out of the way while you have an almost guaranteed cash flow. I know from other women in my TG group slow subtle changes go mostly unnoticed. Hair is a biggie that naturally does not. Yet it is easy to be creative.
One of the most important things you need to do is to keep on feeling good about yourself. I am sure there are decades of shame and guilt you harbor, just as I do. Perhaps big self-esteem and self worth issues too. Certainly body image issues from what I read. These things take time to shed.
I cannot say just how life changing it was for me to start going to a TG group. Perhaps like you, I knew since I was like 4-5 I wanted to be a girl. By 12-14 I knew that was never going to happen as testosterone kicked in big time. Yet after college I twice experimented with transitioning. Both times opting to stick with "normal" since I figured I'd never pass. I spent a good part of my life already being a big fat ugly target, no way was I going to volunteer to continue being one. Nevertheless I still needed my occasional escape, continued to cross-dress. Back in my 20's I even dated full-time TSs. Even got to marry one.
By the time I hit my 50's I had a pretty good knowledge base of transsexualism. First hand knowledge, second hand knowledge, book knowledge. I thought I knew it all. Four years ago when the excrement hit the air handler for me, a lot of soul searching led to the conclusion that a lot of the major disasters in my life was due to me being trans. Time to take the beast head on. Eventually I found a TG support group. The first time ever I tried something like that. What a life changer it was being in a room full of women, much like me, hearing of their lives and stories.
Over these past 4 years I've gone from no way do I want to transition to well...maybe but. Lot's of reasons not to like cash flow. My wife (post-op MTF and knew about my history), while sympathetic, took a long time to forgive me and be supportive.
Over these past 4 years I've gone from presenting only for the monthly TG meeting to also for the therapist, to also the remainder of the therapist weekend (Friday day off appointment), to most weekends, to most evenings, to essentially anytime outside of work or in obvious sight of the neighbors. (I live in hillbilly country)
Over these past 4 years I've learned one very big and important lesson. Stop worrying about the future and what's next. Each time I do start fixating on that (Occupational hazard for an engineer) I get into major funks. All while I was just thinking how great it is to feel alive, to feel joy, to actually feel good about being me, being in this body, to actually achieve my life long dream of being seen as and accepted as a woman. While I have a pretty good track record of analyzing situations and being able to predict what's next, when it comes to my life it is abysmal. I never would have predicted I'd achieve that dream. I sure would never have said 3 years ago I'd be seriously considering transitioning to full-time, much less part time or even going out presenting in public yet again.