Megan, I'm writing this 11 hours after your post, so we have some history and I feel I can be frank with you.
I remember being in your position, wanting to "break into" documentary. I beat my head against the wall for years. Finally, I gave up and made my own damn documentary. Suddenly, doors began to open. I went from being a wannabe to being a filmmaker.
When I sold that first film to a broadcaster I suddenly became an "insider", and began hearing from people looking for the secret. I was always being invited to go for a coffee, and listening to stories about how "I've wanted to do this all my life". Many of these people were/are former colleagues from my time working in public radio. They offer to work for free, swear up and down that they're committed, that they want to make the world a better place, that documentary film is the only pure film, blah, blah, blah, blah......
Out of the 50 or 60 people I've had this conversation with over the years, I can think of one who actually followed up, fought her way into a position and is now working in the field.
My advice to people starting out now is to beg, borrow, or steal a video camera and make a short documentary. Really short. Do everything yourself if you like, or convince friends to help shoot, edit, write or direct it.
Then, instead of asking "How can I live my dream of making documentary films" you can say "I've just finished my first film. It's short. Would you mind taking a look?"
I could go on and on...but you get the drift.
I wish you the best of luck, Megan. Really.