Hi, MAC
There's a few million people in this filmmaker road race.
I'm pretty sure most of us eventually realize we should be content with just finishing, and soon let go of "making it big".
You only have so much time in a day for entertainment.
There is a glut in entertainment options and content.
The audience is fragmented, which means the revenue streams are fragmented.
Having a "not concrete plan" is both a good and complicating thing.
It allows you flexibility.
It prevents you from reaching out to grasp what you want.
The better you get the more specialized you'll become which means you lose control over more and more.
Start with just what Dima just said: Bang out a short story, only a few pages, film it with anything you can, edit it, look at it and ask yourself "What happened here and here and here? How can I make this better?"
Just doing it is much better than theorizing about it. But you'll benefit from thinking a great deal, too.
Watch a lot of DVD director commentaries, too.
GL!
Ray