We have a vacancy on the Bug Squad for the Friday duty. It's an excellent
way to get introduced into LilyPond work, and a great opportunity to
contribute to the software development. It only calls for a regular
commitment of 15 minutes on your duty day of Friday, so it's not onerous by
any means. A full description of what's expected is at
http://lilypond.org/doc/v2.13/Documentation/contributor/issues. If you
could help out, please let me know either directly or via the mailing list.