First, get you some stoney point / Hornady gauges to attach to your calipers. They make 2 sets and you might as well get them both. One set is for measuring the overall length to the ogive of your finished round, the other is called a headspace gauge, and it measures from a point on the shoulder to the base. This second set will be used to setup your dies once you have some once fired brass. You'll want to set them up so they push your shoulder back about .001".
Here are links to them on Midway - just to make sure you understand the sets that I'm talking about.
MidwayUSA - Hornady Lock-N-Load Headspace Gage 5 Bushing Set with Comparator
Here is the bullet comparator kit (they also make a small kit with less bushings)
MidwayUSA - Hornady Lock-N-Load Bullet Comparator Complete Set with 14 Inserts
Next thing. Take 20 of your brass and set the other 80 aside. That way if you mess up, you've only screwed 20 brass.
Last thing, read the book, take your time and have fun.
ps: If you get stuck, just post your question here.