Hi there,
the devblog is actually quite old and the housing system got reworked multiple times in the meantime.
You now need to craft these objects to place them in your house.
Take all the blueprints to an anvil, and it will show you which materials you will need to craft them. Common materials are leather, iron, nails, wood, spare parts, and the like. Take these crafted objects back to your house and simply drop them from you inventory and place them whereever you like. You can always remove the furniture or rearrange them later on.
If you don't want to travel to an anvil all the time, make sure to craft an anvil to begin with and place it in your house. That way you can directly access it.
A few things to mention: The
Steam release of Enderal will feature lots of new content. There will be even more placeable objects for the housing system and the placeable planters will be finally sized properly.
However, this whole thing won't be compatible with old saves. I just wanted to mention it since you are quite new to Enderal
