Help for my son

I’m trying to figure out what to do with my son who’s behavior seems to be out of control. His pediatrician was no help. I called my insurance and I don’t need a referral for mental health services. He has ADHD, and I suspect Autism and/or ODD. So what kind of therapist should I look for? There seems to be so many different kinds and I feel lost. I am just at a loss at what to do with his behavior and how to help him and I need some professional assistance. Thank you.