You may find the Moderator FAQ helpful. There are links there to additional reading, descriptions of some of the tools, etc. I personally prefer it to the cheat sheet, but to be fair that's partially because the FAQ also links to the cheat sheet, so I only have to remember one URL. :)
Beyond that, I wouldn't worry too much about reading more. Just jump in and try a few things out, and if you have specific questions, drop by the Teacher's Lounge.
Almost anything you do (a notable exception is deleting users) is fully reversible, so there's little pressure, and trying to absorb everything in one go is likely to be futile anyway. There is quite a bit of information to go through.
That being said, I've had a "basic guide to SE2.0 moderation" on the back of my mind for a while now and as we grow and attract folks from outside the SE network, it's edging closer to the front of my mind. I can't make any promises on the ETA, quality, or anything like that at this point, though.
I know that I'm stating the bloody obvious, but the first thing you should familiarize yourself with is your site's Meta.
Moderator specific resources
One thing that took me some time to wrap my head around is that many questions that you could possibly think to ask, even as a moderator, most likely have already been asked and answered. Therefore, I generally try to make it a point to search for my question on Meta Stack Exchange first to see if the issue is covered.
This makes me feel like, when I enter the Teacher's Lounge, I can say what I've tried and/or show research effort. ;)
If the information I find seems like it might be outdated, or if the material isn't clear, or if I'm just plain not able to find it, then I'll ask in the Teachers Lounge chat.
What's amazing about being a moderator on Stack Exchange is that Meta Stack Exchange contains a wealth of knowledge. The Q&A advantage also extends to the Q&A site about Stack Exchange. SE eats its own dogfood!
Another thing to consider is, if the issue isn't a privacy issue or something that you shouldn't share from the moderator agreement, you are encouraged to ask your own community. The Genealogy and Family History users know your site best, and for questions about what to do with a question, how to edit it, should it be closed/reopened, if you ask your community via chat or your meta, it will help keep them involved, which is essential for building a successful Stack Exchange site.