Good post SlowFISH. Yes, CAD skills are transferable. Just looking at a short vid of the Fusion, I see some similarities with Catia V5.
The skills are about understanding how one element is used to create another and how all the elements link together (on a decent system) so that if you change one element, the rest follow the change.
Each CAD system has a 'style' of construction and it (should) maintains that style throughout the whole package. Once you have the style, it is very easy to learn a function that you have not used before, because it works the same as everything else. If you are forced to learn a NEW CAD system, by the time you have figured out the basic elements of points, lines and planes, you will already be 'seeing' the style.
A new CAD package always seems so complicated, and IT IS. BUT, with a basic understanding about CAD, you already know what to look for. If you have never used CAD, then you are in for a tough time.
New CAD users - a beginners course is the quickest and easiest way in. You are sure to know someone who knows CAD and could give you a couple of hours introduction. Find an instruction manual download, preferably with exercises that can be followed. Every CAD system has a forum like TU, were you can ask daft questions, it is allowed.
Dave