I started and recently stopped transition. I was on the fence all my life too, finally took the plunge. From my personal perspective, if one is ambivalent, one is probably not trans. Transition is not something to trifle with, you need to be really serious and it has to be for yourself only, not for others. Ambivalence probably makes one a poor choice for transition. Someone truly trans is willing to give up almost everything so that their body becomes congruent with their gender.
In my case I just realized it wasn't for me. I did not feel like a woman, I felt like a man who liked to present as a woman, and the HRT removed even that urge. It took a switch in therapists for one who actually analyzed to see it clearly. My old therapist simply validated my feelings. She recently called me for news and I told her I had stopped transitioning, and was reverting to male mode. She said "I never thought you were a good candidate for surgery". Well gee thanks for telling me now after I ruined my marriage. Attempting transition has actually been the very worst experience of all my life. I hit rock bottom when I realized I wasn't trans. I felt like the emperor with no clothes. Came out to my friends, my family... it's harder to back-pedal than to come out let me tell you.
The good news from this is that I now know for sure I'm not trans. So from that perspective, maybe trying HRT for a while will help clear your mind about whether transition is right for you. At least it's somewhat reversible. In my case, it caused me to lose all interest in dressing and transitioning. True trans women, caught in the wrong body, do not lose their desire to transition when on HRT.
And yes therapy is a must, but you need to find someone brutally honest that doesn't just rubber-stamp your feelings.
