Hello,
I am wonder, what should i say to a guy when we are just starting to talk?

Hunny anything that comes to mind. Let him make you laugh and make him laugh, try to find something's that you both have in common. Its hard at first because you get nervous, and not really sure what to say because you don't want to sound dumb, but you won't. Just be yourself, and have fun!

Talk about school, a trip you went on, a movie you love, anything! :)

Ask him questions about himself and just get to know him. Relax! If you get too stressed out over it conversation will be hard to come by. Just relax and have fun.

Just ask him a few questions and feel free to talk about yourself. If your being yourself and he doesn't like he isn't good enough for you.