I've found that, if you're in a firm like mine, and you work for clients for money, it's important to focus on the basics. One of the things that often gets glossed over is that ArchiCAD is a wonderful 2D drafting tool, and many details will still be 2D. If you start with the 3D "fun" stuff, users have a hard time getting back on-task and learning how to draw. I call it Premature CADucation.
Start with 2D lines, arcs, fills, dimensions, and text. Slap their hands if they touch the Curtain Wall tool. It may even be good to create a training template where the 3D object palettes are hidden. Get them to master the editing commands and the pet palettes before moving on. Then show them walls, doors, and windows in 2D only. Only after they master floor plans and details do you let them turn on the 3D window. Space out the excitement, and get them interested in being able to do things that can be done in AutoCAD, but better. Chances are, the floor plans are where you typically make your money, anyway.
You must walk before you can fly, Grasshopper.
Chuck Kottka
Orcutt Winslow
Phoenix, Arizona, USA
ArchiCAD 25 (since 4.5)
Macbook Pro 15" Touchbar OSX 10.15 Core i7 2.9GHz/16GB RAM/Radeon Pro560 4GB