I know how tough this can be. Every therapist before the one I currently have I went to because somebody told me that I had to, or should be going. Going to one when you don't want to be there makes it really, really hard to open up. Even though I'd have Trans thoughts in the past, I'd always dismiss them and was deeply embarrassed to admit that they'd even exist to anybody, let alone to some guy I'm being forced to go to.
The difference between my current therapist, and my past ones is that this is the first one I actually wanted to go to, and that made it easier for me to open up to her. It also helped that she's a specialist in gender identity issues, so I knew I was opening up to an expert, and to somebody who would know how to handle my situation professionally.
You don't have to stick with the first therapist you see. Most have a free consultation period that you can use to see if this person would work out. I'd been to a couple before I settled on the one I had, and I would definitely spend the time to research your therapist to see their areas of expertise.