The purpose of a storyboard is to create a plan which can be understood by all people creating a video - camera operators, sound effects people, actors etc. It doesn't have to be beautiful but it does have to be clear about what is going on.
Source: Into Film
There are a lot of storyboard templates available. Canva has a selection you can choose from too. Just find one that suits the project you are completing.Â
To plan a storyboard, you need to know about different types of camera shots.