Can anyone help me figure out how to change a wav file to an mp3 on my computer? thanks
If that is all that you want to do, then I’d recommend using any of the free and easy to use MP3 encoders such as LameDropXPd.
If you also want to edit the file, then Audacity can export as MP3, but requires that “LAME” is also installed (see: FAQ:Installation, Startup and Plugins - Audacity Manual)
To help you get started with Audacity, there is a “Tour Guide” here: Audacity Tour Guide - Audacity Manual