I’ll definitely watch the new course when it comes out! But 100% it makes more sense to wait until GP 3.0 is ironed out.
I didn’t think I would ever have on-going 2 versions of Blender, but even trying to change my mind and go back (appending my half-started project) to 4.2 didn’t work. It was broken beyond repair… The Grease Pencil properties tab on the appended object is fully blank and all layer/points information is gone. At least I can trace over it. Lol.

So here we are. Two versions for now… and I might wait to play with GN with GP later on.