Hi Craig,
It's worth reinforcing what David referred to, which is that although most distros provide versions of lilypond and frescobaldi, they are generally older. You will have the advantage of stability but lose the newer features. For myself, I find the development versions highly reliable in general (and believe me, I stress the programs to the max) and therefore I recommended after choosing a distro to download lilypond from
lilypond.org, and frescobaldi from
frescobaldi.org, respectively.
Wishing you success from Down Under where our Christmas Day will be round 40 degrees centigrade (104 F), hardly the traditional picture of snow and reindeer.
Andrew