I just started charting and its much easier and more fun than it looks at first. Like Callie says, you just need to take your temperature every morning when you wake up and record it in fertilityfriend, and also check your CM and record that. Once you have thsoe two things, it will predict your fertile days for you.
I've learnt lots and it passes the time waiting. Having said that if it stresses you, its probably better to TTC without charting to begin, and only start if you need to!