I think, this should help a lot: http://winter-jam.businesscatalyst.com/pinning.html
Pinning is visualised directly on a page. When you resize the browser window, you can see the reactions immediately.
That's a neat resource. Thank you. Even if I think that sometimes, in the complexity of explanations, they forget to teach the "simple".
And what about the basics of layout?
The first time I approched with muse, I tried to make a fake website and I thought that what I saw (working in the full space/canvas) will be the full page, instead of a centered column website. Is this really only a matter of fluid/not fluid or there is something else?
The main question still stays incomplete, though: where can a human being learn the basics (officially)?