I don't know; looks a little like running from here, if you've only seen her twice and admit you haven't gotten to know her yet? I think you might want to "grow a spine" to stay and keep trying for X period instead of cancelling this appointment?

Setting a goal (I'll try for 10 sessions) is not a bad road to go, I don't think. Maybe you could go see her and just discuss that, setting a goal of how many times to see her initially?

You don't ever have to "defend" your decisions; they're yours and 100%/always valid for you and your life. You just have to own them.

I'd try to screw up my courage to stay. In my experience/life, the more I cut and ran (never finish classes I started, had an "A" going into one final exam and then didn't show up for the exam) the harder it was later to turn that around.

I've been working hard since 1991 to "fix" my not finishing what I start that my life handed me with the help of my stepmother. Remember, you're always moving in "some" direction -- everything we do takes us further in one direction or another, there is no "I'll fix it next time" because it gets harder and harder because we've moved further and further down a certain road and the weight of our habits make them harder ones to change. I started gaining weight in 1976 and now I'm 125 pounds overweight, I've gradually ceased "exercise" and it started with having shorter distaces to walk to my car/work, etc. and now I'm having a heck of a time reversing those those small, one-at-a-time bad choices I made.