I have had ADHD all of my life (I was diagnosed as a teenager and now I am an adult) I have talked to a lot of people who were diagnosed as children, and some later in life; some accept that they have ADHD and see it as a way to explain why they behave or act in a certain way. (Constant foot tapers, or constantly forget where they put their keys or purse or backpack or why they are so outgoing, friendly and creative) while others see it as "curse" or hate having it.
I won't go into details about my personal story, but I can relate to most who are diagnosed either they think there life is ruined or that it is the end of the world or see it as a way to explain why they are foot tappers, are super friendly or really creative.
It is not the worst thing to be ADHD, or have ADHD, lots of famous people have ADHD and it is actually a pretty common thing to be ADHD or have ADHD-like symptoms.
I have had it all of my life, and I see it not as "curse" but something that I live with or what makes me so unique or special.
I was embarrassed for many years to even tell people I have ADHD or let them see that side of me but I don't hide it anymore and I just be ADHD, and people don't accept me or like me that is okay and I am fine with that.

Some people who have ADHD are medicated and some are not, it all depends on you and what you think is best, some seek other alternatives to medication such as using grounding techniques or having behavioral or cognitive therapy, or go to ADHD support groups.

Don't beat yourself up for having it, or were later diagnosed in life, some of us have had it all of our lives and are used to it or don't notice it, while others have recently been diagnosed.

Just be patient with yourself, go easy on yourself and find laughter in things, and don't forget to smile!