ADHD Diagnosis as Adult

I have always been a very restless talkative, fidgety person. I was recommended as a child to see a doctor for an ADHD diagnosis, but my asian mom was scared that I would have to take pills or whatever. Then, again in highschool i got my teachers for fill out evaluations for me for ADHD but i never turned them back

in. Now i’m 22 and I feel like i’ve always known that i’ve had ADHD but i kinda just want to be diagnosed so that i’m sure. So that people can understand why i am the way I am ... I can say, “I have ADHD” with confidence instead of not being sure. Does anyone have any experience with being diagnosed as an adult? Is it weird to be diagnosed as an adult? Who do I talk to?