Attached Link: Star Trek Aurora

I can't really add much to what's already been said except a little more encouragement. I would say just go ahead and start, you can learn along the way, and at worst you might have to go back and redo some earlier scenes (like I've done) as you get better, but I've always found that you learn a lot more with a real project with a clear goal than with abstract training. My first animation was just a Poser guy walking in a straight Walk Designer line across an imported background I had made, but that was enough to convince me that it was possible to make a movie, since a movie is really just a bunch of 10-second clips strung together, so you can approach it in pieces and chip away--you don't need to move the entire mountain at once.

For voice talent, you might check online sites that have free audio dramas, like Darker Projects:

http://www.darkerprojects.com/index.php

Their site has a place to request voice work for outside projects. I also engaged work from a fellow Poser user who also does acting for fanfilms, so poke around sites where people are already doing "free" acting for online productions--these people are obviously already interested in doing this kind of work, and already have access to recording equipment.

Good luck!--Tim