Thank you for nice tutorials.
I think before adding NPC and quests it would be nice to have tutorial on even more basic stuff like map editing (mountains, ocean, buildings, dungeons), placing objects (props, foliage), AI grid, fog of war, ladders and teleports etc. Stuff stat should be created before quests and scripting.
Larian has a handful of tutorials from the DOS1 days that will help with much of the basic stuff you're talking about here. What they don't have is the scripting, NPC, and questing info that Windemere has been covering!