While about the only guilt I still harbor after these past seven years of taking on the Trans-Beast is the pain this is causing my wife, I can sympathize with the desire to "Be Authentic". Taking on the beast is just so we can feel and be authentic.
For me, much of the authenticity started by working on the inside, on myself. I had a ton of baggage to loose. Worse yet was a lifetime of bad habits/though patterns developed by not handling being trans. This took a lot of hard, scary, risky, pushing my personal envelope, work. It took time. It was aided by some angels there to catch me when I fell.
Eventually the Shame and later the Guilt over being trans, being me faded. That old "Some Guy in a Dress" feelings replaced with the shear joy of being out in the real world as the real me. Feeling "Authentic" to me goes far beyond just the gender ID, which is just a part of the totality of what makes me, Me. There are many other aspects of me I need to be true to. Some with conflicting needs and wants that I have to balance.
Today I still live and present primarily as male. A lot why is the balancing act I perform each day called my life. Thankfully the GD is not so intense most that that I always feel that I need to transition, most days it's just want to. Both of my therapists have asked me the same same question; "What would be different if Joanne showed up for work tomorrow?" Both times my reflexive response was "Nothing", soon followed by "I would feel more authentic". But that more would be such a small percentage compared to the about 80-90% I generally feel I am.
For the most part, the who everyone sees and interacts each day is the authentic me, without hair and makeup

OK, and some occasional crying. I suspect there are plenty of small things you do, or don't do, around others because you feel if you do otherwise this big dark secret you have will be instantly recognized by others. I sure built up some pretty good walls as well as the grand Hollywood back lot of a me, a me I thought others needed to see.
Coming out to others seems to be what you see as a means to, in a way to make it easier, more explainable, for you to be yourself. Do you really need a reason to be baby step more like the you that you have apparently been hiding? If anyone asks (doubtful) "What's gotten into you?" just tell them the truth. That you have been in therapy and are trying to knock down some walls that you built keeping you from being the you want to be and not the expected you.
In time.... All will be revealed. When you are more prepared and able to take on the challenge