Good advice here. Get the Palmer book and read at least the sections on brewing your first extract batch. It's a very good starting point.First, read and research a lot. Howtobrew.com is a free web version of the home brewers bible and while it may not be the most up to date version it will tell you what you need to know. Start with simple recipes that are tried and true before getting crazy with things. I only brewed 4 Mr Beer extract kits before jumping into all grain but many people stick with extract for longer. As long as you enjoy it, that's what matters. Temperature control during fermentation is the most important thing followed closely by sanitation and cleaning. It's difficult for me to control fermentation temps without room for a temp controlled freezer currently so when it's hot I brew Saison and wines as they don't require cool fermentation. Feel free to pm me with any questions
Also, take a trip to your local home brew supply store and see what advice or direction they can offer. The better ones should be able to give you pointers, set you up with a basic kit, and get a recipe together for you.