Oh dear. But turkey is really easy. All you need is a thermometer. I have one with a probe you stick in the right place in the bird. It's attached to a wire that comes out of the oven and feeds into a magnetized monitor. So you can stick it onto the front of the oven or wherever. And when it's done--you can set the desired temperature--it beeps.
The first time I used it--with a 12 pound turkey--it was done MUCH faster than I expected. And the turkey was perfect. My mother's old advice--20 minutes a pound--was just... wrong.