Paradox games are games you play, fail at many times but learn something new everytime you do, and once you know enough to stand on your own feet in the game. You'll understand the game better bit by bit, and every bit you come to understand will fuel your drive to play the game better and more to your own fantasy and play style.
But yeah...you have to fail at the game ALOT and really badly before you understand how it works.
I booted up vicky about 10 times before I even understood that game.
EU2 needed like 7 boot ups.
EU3 needed only 3 but thats because I was finicky on who I wanted to play as.
CK2 I learned in 5 game sessions. The tutorial really helped me get along in the beginning to understand the basics. Really good that was added even tho it was broken at some points.