A big part for me was also going through the DSM-5 and using that to diagnose myself using the official criteria. Ended up finally getting medication that works for me (after fighting the US healthcare system for like a year) and I take it when I need to focus up for the day, assuming I actually remember to take it.

DSM-5 via Anna's Archive (I'm on mobile right now so I haven't checked how good this pdf is but there are a bunch of other versions if this doesn't work)