Making a movies is a long term game. One of the mental attributes that all successful people share in common is a never ending ability to keep their eye on the prize. The secret formula for filmmaking success is patience plus unyielding persistence in a face of adversity.
If you find yourself faced with filmmaking self doubt, you’re not alone. The important part is that you at least get a picture of what you want that is very specific. Then you should take time to work backwards. And who knows, maybe a decade from now we will be working on movie projects together.