Everyone has brought up great points!
Is this going to be your first time getting therapy? If so, you might learn more about what you like/dislike once you start getting into sessions.
For example, some people do really well with the psychoanalytical, lying down in a chair and venting kinda therapy where the therapist never says anything except a couple thoughtful quips once in a while. Other people need engagement, structure, advice, conversation, etc. So they might do better with CBT or Gestalt.
During your sessions, be honest when you're feeling uncomfortable. See how your therapist reacts, and note how their reactions make you feel. It's important that you can trust your therapist, that you feel they can understand you, and also that their therapeutic approach both challenges and helps you. So if at any point you're feeling like you're grasping at straws to engage with your therapist, like you are talking to an uncaring wall, or that you feel your therapist doesn't believe you or doubts you ... take a note of it! Don't be afraid to bring these things up and maybe look for someone else if it comes to that. You're paying to get treated, you should get your money's worth.
Good luck! hoping it goes great for you!