Part of what I think you are struggling with in accepting transgender is your belief that you must completely alter your life to 100% female. Now, maybe in the future you will. I am not suggesting that you won't, or shouldn't. I am going to say though that there are more, many many more people in the transgender spectrum that are not living 100% the opposite of their birth gender, then are.
I can tell you as can pretty much everyone on here that acceptance is not just an on and off switch. It is a process. A long winding sometimes wonderful sometimes difficult process. I am not transitioning. I am not planning to. I am never going to say never, but I do not see transition in my future. Right now, I do not need to in order to feel good about myself. I do not need to in order to function. But I did get to a point where I needed to accept that I was not cisgender. I did need to accept myself as more feminine than the average male. Enough that I often will behave in ways, have mannerisms that are more like a female. And I dress as one sometimes. I do not live as one though. I do not consider myself to be a female, but like a female, or perhaps part female. Will it go further, I don't know, but I know I am more at peace with myself and able to be a better everything with simply my self acceptance and just being able to be myself.
I totally understand your worries about the others in your life, namely your wife. Now, some do end up staying together even through full transition, although many do not. When it comes to simply accepting oneself as transgender, and perhaps crossdressing or perhaps other simple ways of expressing femininity, more couples stay together than don't.
You can be transgender and not do a full transition to the opposite gender. Again, not saying that you should or shouldn't, or that you will or won't. I am just saying that to be transgender does not mean you have to, or that you are 100% the opposite gender.
I think for right now, rather than to take on all of mt, Everest of transgender, just start at the beginning, the 1st base camp if you will. Just take it one step at a time. Many never get to the absolute top. It is not right for them. But even for those who do need to be there, it is not a straight climb to the top. It takes many years in most cases. It takes many stops along the way. When you are ready to go further you will. If you have gone up far enough, you will know that too. I personally am camping out about half way up. My wife is fully aware of this. Not always easy for her, but she accepts that this is who I am. I don't know if I will ever need to climb higher or not. Right now, no. I am not making any plans to. If one day I begin to feel like I need to go farther, I will then begin working on that. It has been 3 and a half years from me to when I 1st truly accepted myself. Please try not to think of it as a one and done deal, okay.