FWIW, I have done voice work and audio production for years and have used it all, including ProTools, however the previously mentioned Mixcraft is pretty hard to beat for the price and is far simpler for those new to the art to learn how to use. It also comes with a pretty extensive library of royalty-free music and sound effects for you to get started. An example of the kind of stuff you can do almost entirely with Mixcraft is here:
http://technobamics.com/I also use Sony Sound Forge for recording or processing individual clips (like Dick Blumenthal blowing up in the link above) since it has some additional and very powerful tools for processing, in particular saving in various standard as well as customized formats.