Dr. Lawrence M. Schoen :: author :: publisher :: psychologist :: hypnotist :: klingonist
:::: Campbell, Hugo, Nebula, & WSFS Award nominee ::::: Cóyotl Award winner ::::Try this series of videos: https://www.youtube.com/watch?v=W3G1gSWuy7Y
Some of the sounds aren't perfect, but he's getting better, and it's a good place to start training your ear (and your mouth).
If you have the paq'batlh, you could listen to my recording of the first book: https://soundcloud.com/qurgh/sets/paqbatlh-paqyavI'm not perfect either, but it should get you started.