I'm no expert, but I have a therapist (T) who I find very helpful. Here's a partial list of questions to help decide if or how to proceed:
1.
What would you define as your core challenge, i.e. to address in therapy? For me, I was "stuck" emotionally (and remain so in some ways) during and following my disordered relationship. Somehow, even though it took me a while, I realized that I was "stuck" because I numbed myself from feeling emotions. It has come to light that I had core family of origin issues that kept me stuck in the r/s. I'm working on that stuff now and while it's not always fun... . it has helped.
2.
What type of therapy do you want? You need to read up on the various types, which can address various things. "Talk" therapy is typically psychodynamic, or insight, therapy. "Cognitive Behavioral Therapy" is another type with various iterations, like Schema Therapy. I've searched around here:
www.mentalhelp.net/ , and listened to the podcasts (e.g. one on Schema therapy):
3.
What would be your goals for therapy? Letting go? Figuring out how you participated? Forgiving yourself for the BS that goes along with these types of relationships? For me, it was all of the above.
All the best. Keep coming here as well. It helps.