have you had any guitar lessons in the past? do you know the chords?
if you want to learn it the proper way, i suggest you start with a classical guitar. a lot of the well-known guitarists (if not all) like Steve Vai and Joe Satriani have classical guitar background. i taught myself how to play classical guitar, and it's easily done. i suggest you start with a classical guitar (which can be purchased for under $100 for a nice used one), and buy a beginner's guide. there's a really good book, but i forget the title. good luck.