I'll do my best to answer your questions:
1. Charting and taking your waking temperature is the best/easiest way to be sure your are ovulating- read "Taking Charge of Your Fertility", its a great book that will explain all the charting and stuff and that will make doing the Shettles thing a LOT easier
2. It just depends on your body. Some people are regular as soon as the first ppaf, for me, not so much. My first 3 cycles were about 60 days long, then my cycles became more regular. It is also possible to be almost regular, and have your cycle thrown off by a month when dc is sick or teething and nurese a lot more, an the ovulate 2 weeks late or something crazy.
3. CM is probably the best way to judge fertility, though some women will have CM more than once in a cycle before their body is up to Oing during those first few PP AFs, so bding whenever you have EWCM should cover that.
Laura, Mama to Mya 7/02, Ian 6/07 and Anna 8/09