CNC class at instructables.com

They would have to offer several for the various software packages. I believe Instructables is owned by Autodesk. So, if they offered a class, it would most likely be Fusion 360. However, the Fusion 360 website has lots of instructional videos on using their software as well as a Youtube channel. What I like is their lessons are about 5 minutes long, so I would open Fusion 360 and work along with the video, and turn that 5 minute lesson into about a 30 minute very valuable lesson.

If you take the Instructables 3D printing class, they go into Fusion 360 to make the item you are to print. That portion of the class was absolutely worth taking for the CAD lesson itself. It answered a lot of my questions on how to do complex 3D shapes easily. These lessons are lessons 3 3D Printing Class and 4 3D Printing Class.