Crafting
Making something takes three things: the recipe, a workbench that makes it, and the materials. Most recipes have to be unlocked first, by a technology or, for a few, by a quest. Most workbenches are buildings you put down yourself at an area’s build desk. How fast the work goes, and whether you can start it at all, depends on your mastery.
The game data lists far more recipes and buildings than the demo lets you use. For most of them, nothing in the demo’s data unlocks them. Every page says at the top when the demo cannot make or build it, and why. The town’s stalls cannot be built in the demo at all: every one of them is unlocked by a full-game technology.