Welcome to your one stop for all things Grease Pencil! Here you will find everything you need from links to training, samples .blend files, and more.
Blender 2.8 Download Page
Remember that you need a decent graphic card to have a good user experience to work with Grease Pencil.
Learn by Example
Is it scary to start with an empty scene? Try these .blend files provided by the community to study their workflow.
Grease Pencil Fundamentals Course
These videos are great to see (and share) the potential of Grease Pencil used in different environments.
Or maybe, are you new in Blender?
So check this useful getting started Youtube playlist