My brother as an adult was able to self diagnose and just try adderall(or was it ritalin) since even non-ADHD people get benefits concentrating with it, and yeah that worked out well for him, he doesnt continue using it and can approach professional work more holistically. I would attribute a lot of his academia challenges and underperformance to undiagnosed ADD/ADHD. Works great for the coked out party scene though. Got to swim in the right environment.
I dont have the above experience, but I did take an in person class at a college recently. Havent otherwise done formal education in almost a decade. The first couple of sessions I was fidgeting and couldnt stand sitting still, which was shocking to me but I got acclimated after that. I cant imagine what children are going through, I think our environment isnt helping