This protagonist born and lives in a peasant village in a medieval-like age, where education and science aren't known much. But a certain awful event occurs in this village that leads this character to leave his homeland and starts a journey to put an end to the causer of such event.
But many things about the world are unknown by him, and have to be explained by another character that knows about them.
My question is: is it believable that the protagonist only know about things related to his village and peasant life, and nothing more? Or would he look too "ignorant"?