Guitar lessons, or a friend willing to watch your hand positions and provide feedback, are great ways to start--literally just a few weeks so that you don't develop bad habits up-front. The feedback is crucial early on. Maybe you can even borrow a guitar from a friend for a short period to find out if playing is really for you.
You will learn most by experimenting and listening to or watching other players. Play along with other folks as soon as you know some basic chords and you will learn faster.
Don't be surprised that if you take to the guitar, other stringed instruments will also begin to appeal to you! It's very common and does not indicate you have a problem
