Here's a super useful quick overview of storyboarding by Jugaad Animation.
The upgraded Grease Pencil in Blender has opened up new opportunities in Storyboarding and 2D Animation.
However, to use that function, you need to have a basic understanding of Storyboarding. Storyboarding is a process where you take the finished script and visualise it with drawings. This is mainly used for planning the rest of the production.
I have created an infographic [made in blender]which shows you all the basics of storyboarding.
The infographic contains questions to ask yourself while planning a shot, the questions are explained in detail in the blogpost.