I'll normally record my vocals in another DAW like Pro Tools or Audacity so that I can layer harmony, or whatever while an audiotool session is looped in the background on my headphones. It's not the most efficient work method, but it allows you to sing along with your track made on here. You can do this same thing with probe recording.
Let me know when you get something uploaded with some vocals, I'd love to hear it!
how to add a song