Is Blender good to make a film? Sure. Many people do it.
Is making a film alone a good idea? Is such endeavour for somebody who is not patient?
Doughnut is 20+ videos, but doughnut is just the beginning. To make a movie you'll need much much more.
I'd say you should do two things:
-
Find out which part of film making you really want to do. Learn that part. Yes, it will be 20+ videos.
-
Look for other people to collaborate.