Crusader kings 3 as Poland in Another World

Warning: I’m not a Polish, I’m just a guy love Crusader kings 3 and the Winged Hussars. If I write anything that may insult Poland and her people, please notice me.
A Polish high student dies saving other people from a bomber and is granted a wish. As a historical nerd, he wishes to become a lord with a system to the gaming mechanics of crusader kings 3 help him.
I do not know much about European history so I’ll put him in a brand new world that I create myself.
Wish you guys enjoy it!!! -.-