Get a friend or guitar teacher to get you started. All you'll need is maybe 6-8 lessons and you can either play on your own after that or continue with lessons. You'll learn the fundamentals like being able to tune your guitar properly for starters
Friends of mine were in bands and I loved that they could play the songs I listened to. It just so happened there was a great guitarist that lived a block from me and he was offering lessons. I did a one hour lesson once per week for 7-8 weeks and just went on my own after that figuring out stuff and using guitar magazines.
I was doing it for fun, not to be an amazing guitarist. If I wanted to be really good, I would have continued with the lessons. The guy that was teaching me had been in bands, he was amazing. He was in university and I was in first year of highschool so he was a young guy like me and we would trade cd's and stuff. When I was quiting, he was getting heavily into Flaminco guitar playing. The guy was incredible.