I found a psychiatrist who not only had experience with ADHD but also had it. He pointed it out to me in my late 30s and before that I didn't really ever consider it.

If you want medication, you'll need a psychiatrist. But if you just want evaluation and therapy then a therapist is enough (and a little cheaper if no insurance). I will say mental health providers are generally spread pretty thin these days, so expect a waiting list to get in with a good one.

Anyway, make sure it's one who has experience with ADHD because a lot do not and tend to discount it or default to assuming people are just trying to get drugs.