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:

1. Find out which part of film making you really want to do. Learn that part. Yes, it will be 20+ videos.

2. Look for other people to collaborate.