@filibis, I’m sorry because maybe there was a misunderstanding and it was probably my bad.
I wasn’t recommending to watch videos about AutoCAD to learn/practice Sketchup.
What I meant is that trying to replicate those shapes using SketchUP can be entertaining for beginners like me. In fact, I’m trying this one right now without reading how the author did. (I just read if I need to get some clue about how to “afford” (not sure about the verb) the situation). Once it’s done, I can decide if I take a look to the video and maybe I discover there was a faster way (even on sketchup) to do it, so far, the method the author follows for the first exercises on AutoCAD are practicaly identical to the ones you can do on Sketchup.
The interesting thing to me are not the videos or the text, the important thing to me are the shapes they propose you to draw.
In addition to that, if they have some doubts about how to proceed, they can read the article that describes the steps in autocad (most of them seems to be pretty similar to sketchup) and it also can give you some ideas about how the author faced the problem to design the model and if you know the basics you can do it on SketchUP. If someone needs help with the Spanish translation they can ask me.