I don’t think CGC has done a full 2.8+ animation course yet. However, you can always download 2.78 from the Blender site and install it alongside 2.9.
Once you’ve familiarized yourself with the tools and workflow in 2.78 it will be a lot easier to transition what you’ve learned to 2.9. A lot of the learning ends up being just knowing the terminology and what to look for.
Hopefully a new animation series is in the works!
