i could be wrong, but I doubt if you will learn much about interiorCAD at the course. InteriorCAD is a powerful and sophisicated add-on to VectorWorks, but it is still an add-on to the basic VectorWorks.
I has taken me some time to learn how to use it for drawing kitchen cabinets, but the manual that I have is now able to speed people through this learning.
You will still benefit from the basic training, and learning about viewports, layers and classes, how to add text and dimensions, rendering and textures will still be useful when you start to use interiorcad.