This is just for messing around to see in digital form the house that I dream of in my head. Is there a truly free one that does a decent job?
I’ve played with it in Sims 3 but I was wondering if there was something more realistic out there. Bonus if it’s something where I could generate a noob file that a pro architect could use to base a real design on.
You could try sweethome3d (open source). Although I haven’t tried to design a whole house, I’ve used it for designing my deck layout. Take a look at the gallery to see if it fits your need - Sweet Home 3D gallery You can try it online through browser or download the installer ( Windows/Linux/MacOS)
I‘ve designed the interior of our house with SweetHome3D about 10 years ago - so yes, it should definitely be possible, but at that time it had a bit of a learning curve. Still not as bad as using a full fledged CAD package for that job…