Bullet Journal. The thing about a calendar/planner is that it takes a long time to get used to using it. I’ve been trying for a few months and there are still days I don’t use it. I learned that change is hard for humans, and I think for us ADHD folk it’s harder. It’s like trying to turn a ship going at full speed in the water, very slow.
If you have a system you kind of like but put it down, pick it up again. Don’t think all or nothing but start small. Put lists down like “start the washer with sheets” or something small, instead of just laundry (as an example). Put down 3 things a day, even if you have more, and you will find yourself getting used to using it more to the point where you eventually are using it full time.