I'd appreciate an optional tutorial that handholds you through the systems by having you create a scenario. This scenario will be the same for everyone, but should go over the systems in depth.

Not sure of the features yet, but here is an example,
"Welcome to the GM Mode Tutorial! GM Mode is a powerful tool that can be used to build scenarios for your friends and possibly others to enjoy. Look at how empty your world is. Literally nothing is here. Let's fix that! First, click here(an arrow pops up showing you where to click) to open the "Map Building" options. *Player Clicks* Here, you will find a vast variety of tools to help build your map. Now click on the "Flooring" tab(an arrow pops up showing you where to click). *Player Clicks* For starters, let's use the "Grassland"(an arrow pops up showing you where to click) texture to create our flooring. *Player Clicks* Ok, now click and drag your mouse to create some flooring. Let's start with a 20x20 square lot. *Player makes the correct size lot* Ok, now lets add a building. Now, click on the "Buidlings" tab(an arrow pops up showing you where to click) *Player clicks* Let's add a cabin to our grassland(an arrow pops up showing you where to click)*Player clicks*. Now place the cabin in the center of the lot(I imagine there is a green outline(red if you can't place it there) that shows you how much room the cabin will take up). *Player clicks to place cabin* Good, now lets add an NPC. First, exit out of "Map Building"(an arrow pops up showing you where to click) *Player clicks* Now click on "NPC Creator"(an arrow pops up showing you where to click)*Player clicks* This is where you can create your own non-playable characters, or NPC for short. But let's use one of the pre-made characters for now(an arrow pops up showing you where to click).*Player clicks*


... and so on until you have completed your very own scenario.