There are tons of folks teaching the various niches of voice over. One of the most qualified is animation voice legend-Pat Fraley. He's in LA. Years ago, I ordered his cassette (remember those) course and was beyond impressed. Now, if you have a sincere desire to explore with Pat, you might be thinking, "But I live in Minneapolis and he's in LA!" Good news. He has home study courses as well as remote teaching/coaching over the Internet. Go to his website at patfraley.com to see all that he has to offer, which goes way beyond just animation. There's a "free stuff" section too.