Lots of good ideas here, but don't forget to discuss these ideas with her first.
I'd recommend reading ADHD and Adults, it's a good intro to how ADHD works differently in adults than children.
Then maybe talk about her difficulties with her, and ask how you can help. Work to understand her perspective first, what she finds difficult, what she finds frustrating.
Then pick one thing, together, that you can help with. You need to work as a team, taking on challenges together (this is sort of relationships 101, it's a team thing).
Ah, yes, pissing on my back and telling me it's raining, followed by telling us we can't possibly understand it, so we're wrong.
Got any other sophistry you'd like to employ?
Ffs, the economy is tanking, with major metrics showing it for years now.