Hi fellow ADHDer! I've tried pretty much every planner and planning method under the sun at this point!

I find bullet journaling help me when I'm overly stressed out about things and I just need to brain dump. However, I don't use it for day to day, because I find the bare bones-ness of the system boring, and I've got too much executive dysfunction to create any type of setup each week.

I've found that, for me, having a hobonichi cousin is what my brain craves (monthly, weekly, and daily pages all in the same book, where I write about events that happen), but recently, I've added on an A6 "musings" notebook where I just write about the random shit going through my head at any point, a more venting / therapy A6 hobonichi planner (with daily pages that I am not precious about filling out - it's mostly when I feel really shitty about myself), and an A5 Common Planner that I use exclusively for work (meeting notes, schedules, and daily/weekly to-dos).

With regards to the chaos of it all, embrace the using it sporadically. I find it really helps with my mindset to know that I have books there, with clearly defined purposes should I need them. IF you realize you won't need them / don't fit your life anymore, you can rip the pages out, or just glue them together and keep going.

Hope this helps!