This was my first ever brew kit:
It had great instructions and the final product way exceeded my low expectations for my first go. I think that initial justification of a likable beer by not only myself but also the SWMBO jump started the addiction. Since then I have brewed the same recipe 5 times each time tweeking things like LME addition times, hop schedules and yeast. In the end it was a great learning experience and I now have a nice light beer that everyone I know enjoys.
My biggest piece of advice is keep the recipes for any kit you buy and keep a log. After awhile you will see what the basic ingredients for those styles are. Then you can start buying the ingredients in bulk "A LOT CHEAPER" and make brews with flavors you like.
As for Kegging I just started recently myself and highly recommend it. I have yet to invest in proper AG equipment. But short of just getting the gear needed to Brew the investment for Kegging was by far the best.
Welcome to the addiction.