When I saw my first therapist several years it was not at all about transitioning. In fact being trans was more of the sub-plot as to why. While I would have loved for him to have been a gender specialist, when you live out in boonies and seeing even a "T* Friendly" therapist is a 2 hour drive you tend not to be choosey. I had a ton of shame, guilt, self esteem and self worth issues to deal with. When combined with the root cause of being trans all added up to the perfect formula for many of my life's disasters. I had made the choice many years earlier not to try transitioning after two experiments. Faking being a guy sort of worked, but had a few glitches, and needed some tweaking.
I also knew I would have no real life without first addressing some core issues like self-esteem, shame, and guilt. The persona I created was just a facade with so much of the real me kept locked away. I first needed to become one whole, healthy, person before I can even think of any other big life decisions. Or, just risk another, very likely, big life disaster.
Having first examined and addressed these other issues I believe worked out the best for me. Having a therapist that was at least familiar with TG clients was of some help. (Though, now that I relocated and am now seeing a gender specialist there is a world of difference. Even with dealing many of the same basic issues).
Like all things in life you mostly get back what you put into it. I worked hard on my personal growth, as well as being open and honest with my therapist and my wife.