Congrats on charting! It's actually pretty fun.
In addition to Fertility Friend, I know that many women on here use Ovusoft. There's a one-time fee ($40 or so, I think) and it's pretty good software! I think that Taking Charge of Your Fertility also comes with software. I've never used it and I don't think that I've ever even seen it, but again, many women use it, most likely in addition to one of the other 2 mentioned.
And, of course, you can ALWAYS come here to ask questions!!! Most of the basics are pretty easy: use the same thermometer, take temp at the same time every morning, and don't do anything beforehand. After that comes the REAL craziness: interpreting your chart!!!
Good luck! I think it's a great idea!