I'm in the same situation. I've decided what I have to do is make time to record practically everything about my countries on a regular basis - write down on paper everything such as individual province stats, see how they change month by month, year by year, and so on for military units, etc.
Hopefully after doing that for a while I'll catch on to some of the nuances.
I'm also going to turn the pace of the game down. Right now I'm getting lost looking up stuff in the logbook or 'palace' while things keep changing in real time.