How to grow a pair and be confident?

You are growing up and you see yourself as others do more often. So now you do not want to look as foolish as when you where younger. This dose not make you dead just more mature and self educated. in the process of doing this you have just gotten out of practice talking to other people. You can improve on this by talking to everyone that you come in contact with. Even if it is just a "good morning" or " hi, how are you". people will notice and they will engage you in conversation then you have your chance to talk to anyone.