This story begins at Dondheim, with Odin's ask. He wants to get medicine's ingredients for his wife. First, kill ghouls and get a wisp, which is dropped rarely. If you finish one task, Odin will talk to you without going to Dondheim. Next, kill a chicken anywhere and get a Chicken Feather. Finally, kill creepers to get berries. Never leave your quest items at stash, or you can't get next quest items dropped by mobs.