At the simplest there is an audio track in Band in a Box. For a beginner it's easier to pull off. Just remember that if your song is abc.mgu the abc.wav file in the same directory is just the audio. You can then render the whole thing from there.

I'd suggest that for starters. Lots of level of complication are available, exporting to RealBand or some DAW. But to start with put the song in your key and do a verse. Watch the sound button, the wave form. Use the Audio option to kill it and redo it. Get it close, add some reverb. After a few tries you can try the TC helicon harmonies to suit your voice. Don't stick in a lead in for 6 bars or the preview is cumbersome. Honesty, Band in a Box ships with Folksongs in a folder,go the the Children's folder and do something like She's coming round the mountain. Muck with the style. Put the song in a special directory C:\users\you\mysongs . That keeps things in order when you look in there.

Later you can go into Audacity. Pay attention to mono or stereo.

John Conley
Musica est vita