Note: You can proceed with the story and ignore the other wyrm hunt quests. However, doing this quest will take the Wyrm Hunt license from you, permanently closing off the other related Wyrm Hunt quests. This won’t affect your open side quests and notice board requests.
Visit the Duke
See to the Royal Orders
After completing all Wyrm Hunt quests, you can now attend an audience with the duke to proceed with the story. Enter the demesne and explore the area for some chests and other items. When ready, talk to enter the manor and talk to the duke. After the scene, talk to the duke’s chamberlain to take new orders / quests. After accepting any of them, leave the manor and you’ll spot the duchess outside. You can trigger a series of quests by approaching her and triggering a scene. If you keep talking to her, she’ll remove the jester hat Feste gave you and increase your affinity with her, thus opening up new sidequests involving her.