how to find a good therapist?

I've been on the fence about staring therapy to mange anxiety for years. One of the biggest barriers is finding the right therapist. When calling around, a lot of high rated therapists are on waitlists and I don't get a call back. I had a few sessions with an available therapist once but I wasn't within her demographic of expertise and it wasn't a good fit. I'm feeling at a loss and not sure what to do. What are other people doing? Have others had success with online therapy like betterhelp or talkspace?