@Iglooo I’ve struggled with being organized and using a planners all my life. For a while before kids when I was working in Germany I did okay (at least for office stuff) with something similar to a Day Runner. This is the first system I’ve been able to deal with.
One thing I always skimp on, but is part of the philosophy is that you should spend a few minutes every evening reflecting on the day. What you got done, what you didn’t and why. What tasks are you avoiding? Do they need to be scheduled differently? Can someone else do them if you never get them done? Stuff like that.