pretty much what she said, and that book is awesome! very clear and easy to read and its also kinda funny. Well worth it!
Chart looks ok. Just make sure you are taking your temp first thing in the morning, before getting out of bed as soon as you wake up. Temp will start to go up as your body starts preparing for ovulation. Usually in the high 97's before ovulation and then hits 98's after ovulation. If temp stays up, you are pregnant, when they start coming down period arrives shortly after. When I first started medhelp I would look at others charts to learn as well. I have read the book "Taking Charge of Your Fertility" to learn more about chart too!
You can take a look at my chart, and in June, my dr. told me I was going to have anovulation cycle, so I stopped opk but still took temp. Then, after my period I ovulated a week later!! However, you are too young to be having anovulatory cycles yet.