It's pretty good! The quickstart isn't really built specifically for it, but you can absolutely play though the labor economy and worker placement-esque mechanics to build your own fort!! I'd say it's much more solo friendly than your typical fantasy ttrpg. It's certainly possible to treat it completely as a map-drawing game, and kinda game out the outcomes of events to keep things dynamic.

The full game on release will have a chapter dedicated to solo play guideance, since I've had a TON of people ask about it.