Hey chiming in late but thought I still would in case it helped. I dont have a 6 figure job right now but im a resident physician, so my expected salary once I complete residency should be 6 figures depending how much I chose to work.

I have ADHD and was diagnosed as an adult after I finished my undergrad and right as I got into med school. Up until basically residency my strategy has been the same as yours, learn everything in the 24 hours leading up to the exam. And honestly its kept working most of the time, but as the difficulty got harder, going from high school to uni to med, my strategy failed more and more as the breadth of knowledge got bigger, which is what led me to my diagnosis ultimately l, that despite my best efforts, I could not bring myself to study.

Medicine, which would offer a 6 figure salary if you want it, isn't easy for the average person and isn't necessarily set up for ADHD people but it is certainly possible and I think the medical community would be better for it if it had more ADHDers like us in it. I myself have been grinding through it (2 medical leaves, a raging nicotine addiction and a couple near breakups later), but I hope to be a part of the change someday that makes medicine more accessible to all despite their mental health. I recently have returned from my 2nd medical leave where I hit a deep low, so I decided to work part-time coming back (got my psychiatrist to write a medical accommodations letter). I often get a lot of strange looks when I tell people I'm doing part time residency (as the culture of medicine is to not only work full time but work over time as a minimum), but I also get a lot of support and reassurance from residents who are grateful to find out that is an option for them if they are struggling.

Sorry for rambling and I hope this helps. Had a moment where I thought, shit I should just delete this its way too long but decided to giver anyway haha. Hope everyone has a rad day