If it's just a pastime, keep doing it because it's relaxing and to blow off some steam. But if you're not sure if you want to do it, or you're thinking you can be famous, you shouldn't do it because you want to be famous. You have to do it because you love it and you want to play for people. And if that's what you want to do, then do it, but you can't go into it with that mindset of "we'll be in a band and we'll be famous."