> maybe I should find ways to spend my time (careers, hobbies) that work well with that

You're really close to getting it.

Students in school do not have this flexibility. They are required to be there, an 8th grader has no control and little influence over how their time is spent, or whether their tasks are a good match for their abilities.

So the only option in school is accommodation. There are some who continue to expect that into adulthood, but the vast majority of kids diagnosed with ADHD do not seek accommodation in their professional life.

Why? Because they do exactly what you propose. They find careers that match their disposition.