14 days ago - Sleipnir - Direct link
With the build menu open, you can remove blueprints by right-clicking them.

To remove things you have built, you need to deconstruct them with the clear/remove job in the jobs menu. With the job selecting left-click the desired object you want to deconstruct. Someone with the deconstruct skill enabled will come and remove it.
13 days ago - Sleipnir - Direct link
Because the game is in early access, I've not focused too much of my time on the tutorial. I'd rather add more content and features first. However, I will be improving the tutorial and adding more to it to make it clearer before the game comes out of early access. Thanks for the feedback!