You can mess up a lot with this kit, and it will still be good. This was one of my beginning brews, and it was the first one that everyone loved. Ferment at around 66°, and wait around 3-4 weeks to bottle. If you were planning to use a secondary, skip it. It's not necessary.
Make a yeast starter if you have the equipment, although it will still turn out ok if you don't... for this beer. Remember to crush the pack a few hours before brewing. Let it sit at room temp.
Welcome to the beer obsession! Poke around this website, and read everything you can. There are tons of great info and techniques that will shorten your learning curve immensely.
Check the DIY section too. Save money on equipment.