I am lazy to actually right something down but I really wanna help all I can say base your writing on the Mexican tradition día de los muertos or even summary of the movie coco from Disney it’s a good scenery. But make it your own way be creative.
Odyssey and Iliad deal with the Troyan war and it's aftermath while Beowulf deals with heroic endeavors of the main character, Beowulf. The epic of Gilgamesh is one of the oldest epics ever and is from the Mesopotamian culture.