I saw alot of people asking for help to get into the castle and i was also in trouble trying to get in aswell, all you gotta do (not spoiling too much) is to search a piece of paper in the village ;3
Good luck
Or just click on every location until you see a piece of paper attempting to become one with nature.
well you're talking about the second part of it, im talkinng about HOW you get to enter the caastle without the guard telling you to move yo ass