It's lovely that you feel you have discovered a potential answer to these questions around why you are different. However, it's okay to grieve what you missed out on as much as looking ahead to opportunities available to you now you have increased understanding. It's hard, but try to honour your feelings and hold both aspects in balance.
I'm dyslexic myself but have known since childhood, so it's been a different sort of experience, but I know people who have found out they are neurodiverse as adults. It's been a bit of an emotional roller-coaster for some of them.
I see neurodiversity as gift and curse, there are wonderful things about it, seeing and experiencing differently (I would not want to change it in myself). But pain is also part of it. The world has not been created with us in mind, and as such there are more barriers, and your ability to make the most of any abilities can depend a lot on if you have a well to do and supportive family. There can be issues with self esteem and over compensating by leaning too far into bigging yourself and your differences up. It's good to enjoy who you are, but don't ignore your weaknesses or the bad parts, if you ignore them they are harder to do something about. You will disadvantage yourself... try to accept all of who you are (not an easy thing to do, but worth working towards I think).
The more you know about yourself and how you work (and sometimes don't) the more power you have to make changes and get to where you want to be. It can make you a more resilient person, a better problem solver and I think it's given me greater empathy.
I am excited for you, and welcome to the neurodiverse family.