Recently diagnosed. How do you self-validate?

I recently got diagnosed with ADHD-PI a year ago and it took me up until two weeks ago to self-validate and understand I actually had ADHD.

Many thanks to ADHD subreddit whose threads I've been lurking and researching on many different topics about ADHD to learn more. Anyway, my question is, what are some ways you've come to terms with your ADHD or validating that you do indeed, have ADHD?

I mean, I'll be honest...before I got diagnosed I thought everyone felt like this so it was pretty confusing to understand.