This. There is also a book called "Taking Charge of Your Fertility" that is very informational.
Bought this book AND the software to help me with charting!! Extremely helfpul for a newbie like you [and myself]! :) What To Expect When You're Expecting, version 2008 I think, is also helpful!
For TTC, there is also a What to Expect Before You're Expecting. The writing is crap but there is good info in it.
OP, I didn't really rely on websites or blogs. I read several books, including the ones already recommended. Most of us here use Fertility Friend to chart.