Saying Hi and Bye is a great idea to get you started, because it will do two things for you: 1) They might respond well to you, which can boost your confidence

Saying Hi and Bye is a great idea to get you started, because it will do two things for you: 1) They might respond well to you, which can boost your confidence. 2) They look at you like you're a weirdo - this might seem bad, but it's really a good thing because you will teach yourself that sometimes, there's nothing wrong with you, and it's the other person that has an attitude problem! Good luck, and please report back to let us all know how you get on :)