Second step add waypoints. To do that, you have to go in your inspector at the "Edit Quest" :
After that I advise you to add all your waypoint in a GameObject that you can call with the name of your Quest or you can clean your hierarchy by quest :
Name of Quest clean system
Hierarchy Quest clean system
The goal for you is to know well your hierarchy because many quests is polluting hierarchy.
Step 3 : add waypoints created
Once you create your waypoints with empty GameObject, you have to add them :
The quest gonna display for you the way to follow with all points you set. All circle drawed, are detection areas for the player to valid the point.