I would start by seeking out a mental health professional who does complex trauma-focused care! I think the ISSTD has a directory, and you could also check your local community mental health clinic if you're eligible for services there, or search for local private practice clinics. I'd like to say that diagnosis is a tool to help guide treatment, not an end in and of itself. We were diagnosed with DID last year, and it gave us a better framework for understanding ourselves and making progress. I think it's best to go in with the goal of working on things that are troubling you, and to be as honest as you can. With any mental health professional, you can absolutely stop seeing them and find another if they're not helping you. Some therapists and clients just don't click and that's okay. And the biggest therapist red flag for me is dismissing experiences and/or treating experiences as "attention seeking." I hope my rambling is at least a little bit helpful. Good luck! ⸜( ˙˘˙)⸝