ADHD is being intelligent and hard working but completely unable to decide a career path, so drifting through life into your 40s when you finally realise you have ADHD and have wasted the past 25 years.
edit: I studied physics, quit, became a bass player, then a street musician playing percussion, then software developer, then translator, then studied classical music composition, then quit, then became conference interpreter, then learned neural networks and gave a seminar on using neural networks in contemporary music at Ircam Paris in 2018, then went back to studying composition at the university. This year I will finally graduate at 41. Hope to do my masters and become a college professor.
But in my ADHD experience: I'd think of 1000 fun things to do, but do some minor hyperfixation thing(s) and then it's 3am and I did nothing I should have done or actually wanted to do 😵💫
It can go both ways. If it goes your way, I consider that a successful day. Its usually easier to just watch YouTube videos to no end instead of doing all the cool things you thought about.