"You awaken on a small island in a strange empty void. Near to you is a chest with a message inside. What could this mean?"
To play the skyblock map, use the "Create From Template" option when creating the single-player world.
This modpack is not particularly long or difficult, and is more meant to emphasize flavor, creativity and role-playing immersion. In fact, it's basically just meant to appeal to my personal tastes for playing Minecraft. ;)
This pack assumes you are familiar with modded Minecraft and JEI. It is not designed to teach you how to use any of the mods.
Spoiler-free Hint:
If you're not sure where to get started, try working your way to "Forestry" and "Tinkers Construct" machines.