Look up a bunch of production companies in your area and email your stuff. Try to get your foot in the door by showing the work you've already done, hopefully someone see potential in your work. Good luck.
I could recommend a v-mount battery pack to fit nicely on the back of those rails. This is a nice documentary set-up so maybe for those interviews interchanging those tiny Nikon/ BMPCC batteries every so often could get in the way of being efficient.