Animating with Poser has a learning curve - trial and error is the best way to learn. I'm still learning, and I've been at it for a decade.

Anyway, depending on the quality settings and the size of the picture (1280 x 720, for example, which is 720p hi-def), the longest part of the process will probably be the actual rendering. A minute animation = 1800 frames, after all. I mixed sketch-renders in with my latest, a three-minute (and change) video, to speed up the process - http://youtu.be/A93N0GST4zE. Came out looking okay, save one or two spots.

Also, remember that the camera and video editor are your friends.