Hi Jefferey! When I’m coming up with scenes to board for personal projects, portfolio, etc. I too first start out the same way.
However, I’ve found that one of the best ways to generate story ideas is to pull inspiration from personal experiences.
I have an idea to pull from (ex: bad traffic, funny family moments,
people I’ve met etc.) I talk out the story idea with other people,
typically family and my boyfriend. I build on top of the original life experience, and tweak it (ex: I get stuck in traffic a lot, which inspired my sequence about a werewolf getting stuck in traffic during a full moon)
My ideas usually start out disorganized and silly, but once I talk it out I get a clearer idea of how to shape my story.
Then I start to thumbnail, and it’s here where my ideas get more organized, since now I am seeing them visually. I then ask for feedback again.
This process continues to help shape the story to be as clear as possible. With the story clear in my head, it helps me to map out shot choices in my storyboards more efficiently since now I know what needs to happen in the story, and what is unnecessary.
I hope this helps! :D