i suggest, for a beginner, use garageband. do what you have to do, then hit export to disk or something. plug in say, your phone (not sure if it sends to desktop, its been a while) and you can choose mp3 format. easiest way imo
When encoding your MP3 files
finally your Mp3 goes to these process
-Recording audio
-Convert to MP3
-The Wimpy Audio Encoder
First you put the marmalade on the CD, then microwave for about 45 second. Return to marmalade and eat.