[Koha] Help for a volunteer?

I am volunteering at a non-profit organisation in Wellington where I am arranging their resources in a more orderly fashion, and hopefully installing a catalogue. What I need a bit of help with is where to start, although I tend to think of myself as technically pretty good, I've realised from my reading so far that I'm somewhat out of my depth with Koha. If there is a kind soul out there, who is willing to share their wisdom from time to time, that would be wonderful! I'm happy to share some more details about what I'm doing off-list before you agree to anything Thanks, Ruth