Hopefully, you've found, bought or borrowed a guitar pick. If not, you'll need to buy yourself some. Don't be stingy, go and pick up at least 10 of them — guitar picks are easy to lose (they often don't cost more than 30 or 40 cents each). You can experiment with different shapes and brands, but I highly recommend medium gauge picks to start; ones that aren't too flimsy, or too hard.
Justin Sandercoe has thought long and hard about how to teach people to play the guitar, and how to do this over the internet. He has come up with a well-designed series of courses that will take you from nowhere to proficiency. I tried to learn how to play years ago, using books, and got nowhere. I've been using Justin's site for just over a year and I feel I've made real progress. What's more, Justin offers his lessons for free - a boon for any young player who has the urge to play, but whose pockets are empty. I've seen and used other sites for learners: none of them offer as clearly marked a road as Justin does.
When people learn to play a band instrument or the piano, there are almost always professional instructors involved. However, when it comes to the guitar, many of the people who learn to play the guitar learn to play by ear, which is essentially amounts to playing their favorite songs over and over again until they get it right (or at least close).
4.) Check the guitar’s string height by pressing down on the first, second, and third fret. You should be able to do so with minimal effort. Come to the 12th fret and press down. The distance from the top of fret to the bottom of the string should be no more than three times. If it is five times, the guitar may have a warped neck or too high of a bridge.