Thanks for your tips LuxXeon. I will do the Wings3D box modelling tutorial but I've been playing with it a bit and I don't find the UI that friendly. So I take your advice as Wing3D being a good starting point. I will do the tutorials and then I will quickly move to another software.

Because I just installed Nvil and without reading any tutorial I've been able to figure out how to arrange the viewport, move objects, and do basic things which I can't even figure out how they work on other softwares I've been trying. And I like the UI very much. It is exactly what I was looking for.

And 80$ for the license is ok.

Yarp - author of P3DO Organizer for Poser