Hello Mihoe, I read your initial post and some of the following answers... I admit, not all of them.. So apologies in advance if something is repeated...
At the beginning, I had exactly the same expectation as you. To visualize a few drafts so that you know in which direction the future house should go..
I came across the software Sweet Home 3D and just started drawing on the MAC... I was immediately impressed by how intuitive it was to use. And the best part.. I saw results right away. That sparked my ambition.. In the end, I spent practically every day for a year working with the program. Very important.. constantly reading in the forum and help sections. After about half a year, we decided between 2 main drafts for the single-story version and for another half a year I optimized. Tried again and again, virtually moved our furniture, visualized... Then left it for a week... got back to it... and kept making improvements.. I found the visualization extremely helpful and could imagine everything very clearly!
With the final floor plan, we then went to a construction company with the best recommendations. They then delivered us such great drawings of our draft that we immediately hired the construction company.
Best regards Steffi