A good therapist will figure out what works for you and diagnosis any underlying conditions as well. You'll experiment with, for example, cognitive behavioural therapy (CBT), acceptance and commitment therapy (ACT), dialectical behavioural therapy (DBT) or just general mindfulness.
I would say try a session with a few different therapists and see how it goes. There are online professionals, but I have mixed feeling about that. People lay down for a reason, sitting in front of a monitor is not the same.
The very fact that you have to present your life in an understandable structure already helps. Actually, that's a funny story. I was so frustrated that my sessions were useless because I could not describe my problems, that I started rehearsing my sessions. What should I say; what is important; what is not important and should be skipped; what is the best order to tell things. After a few months it was not necessary. So the first useful skill I have got is communicating in a clear manner. Especially communicating about feelings. People usually have no idea how to describe what they feel and jet get angry or something.