Hibernia's starting zone, Mag Mell, is a mystical forest teeming with sprites, pookas, and other fey creatures. Quests from the Fomorian Watchers and the local villagers will introduce you to the realm's unique lore and combat. Progressing through Mag Mell will eventually lead you to the grand city of Tir na nOg. Here, you'll find numerous quest givers, including the High King's emissaries and various guild masters. Ensure you visit your class trainer within Tir na nOg to unlock new spells and abilities. The 'Whispering Woods' quest line offers a good narrative and experience. Utilize the natural chokepoints in the forest for easier monster pulling.
