I can share my experience with adhd, as a person with diagnosed combined type adhd and oppositional defiance disorder.
Before treatment, I had issues with many things in day to day life. Organisation, time management, forgetfulness, motivation, irritability, hyperfocusing on subjects that interested me, and lack of focus on things that didn't. My attention span could be mere minutes in conversations or activities. I would move from one activity to the next, without seeing them through to completion. Silly mistakes and overlooking certain details.
I was very active, as the saying goes, the feeling of being driven by a motor. I could not relax or sit down, I always had to be stood up or on the move. When I did sit, I would fidget. Tapping hands and feet, playing with things, or if I could get up and walk around I would. I absolutely hated being seated.
Emotionally, I was very closed off, and couldn't really make sense of what I was feeling or experiencing. I was also very run down and self critical a lot of the time. This could be due to my history of depression but I feel it is relevant, as my experience of being different, and not being able to function as others do did get to me. I also had a very short temper. Anything that I saw as illogical, or didn't make sense got me frustrated. I wouldnt tend to accept any other viewpoints but my own. I was very defiant and disliked positions of authority, I especially disliked having demands made of me, this got me in trouble at the workplace, as you can imagine. This was probably more the odd though.
This is a short outlook on what I experienced. Every case is different and yours might not present like mine, or anyone else's.
Hope this helps 🙂