Web search for PT /DC in your area and look at their websites if they have one..
I like to see real information and articles on a site vs just a single page.
Your health Ins website should have a search function also and the list should expand to website link , or search the name if it doesn't.

When you find a few that look promising, you can call or drive by and stop in to chat..if not busy they will have time to talk with you..

Advanced training & studies mentioned is good.
My chiro didn't know about TOS , but he knew about the body as a whole & could see I was in pain and had spasmed muscles. He found me LOL

Chiro is kind of scary at first, but after going to 2 of them, it isn't really at all, quite gentle. I don't think there are many old style rough spine crackers out there anymore.. Most have a meet & greet/1st visit /assessment where you can get a feel for their knowledge first.