I am a fellow guitar player myself, I do not have a band, but if you have "skills" then you should be able to get a single gig around town. I play in coffee shops, bars, I have even asked to play in front of the ingles shopping center, I was allowed to, and had a pretty huge gathering. Just go around to places and asked if they would let you play there and ask them if they would mind to give you a audition to show how good you are. Now if you play christain music, well then you might have problems on getting a gig like the places I do.. So that is for starters, and like you said, you are only 16, I don't know of many 16 year olds getting record deals anyways. So I would not even go through the hassle of creating a demo and sending it to record label just yet, first you need experience at bars/clubs/shops that is where to start.