Whoa, dude. Recoil, go previous! Before you venture out in front of an audience, you might want to make sure you have an act.
If you have little or no experience, you might want to try to play some neutral environments, like band contests and friends' parties. Since you're under drinking age (Unless you live in Brazil or Denmark), you probably won't be playing in bars and if you do, you might not really like your audience.
Of course, it depends also on what your goal is. If you just want to play, there are the settings I mentioned, as well as public fairs and events. If you play one of those, you'll get some exposure and might even get some contacts. You'll also get some pretty honest opinions about your performance, so make sure you're well rehearsed.
If you want to play for money, your band might have to learn some repertoire songs that actually fit a bar band context. I once played this nostalgia gig and had to learn about 30 songs. Fortunately they all had that "Johnny B. Goode" style bassline, so I had an easier time than the singer who had to memorize all the lyrics, but that's enough about me.
Will C.
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"I'm not a Genius; I'm just a hard working guy".
-BW