How do you go about getting a psych diagnosis?

I often wonder if I’m ADHD or on a spectrum of some sort but I hate just going on Google and doing some stupid quiz saying am all the above and then some. I really don’t accept those quizzes and I am feel like I have been masking for many years but now I’m starting to feel my mind is slightly different because my anxiety and depression is exhausting and I’m tired of the roller coaster.