You can complete these solo or in a group if you’re having trouble with the harder challenges. You get haedrig’s gift on chapters 2,4,6 for the full 6 piece set. A little present you get in your mail that gives you two set pieces.
There are multiple chapters, and some of the rewards are “haedrig’s gift”. It displays what things you must do to complete each chapter. There is a hotkey in game, i think it’s Shift+J, but i forget what it is since i just click the little green leaf on the top right to open it. You’re playing season which is great, so on the character select screen you will see a seasonal journey button for the seasonal journey quests. Yes harder difficulty give more chance for loot and more drops.
