What can I do to know?

I am male in early 20's.My only sexual experience is with a man when I was younger. It was not proper experience because we did not go all the way.I wonder what it would have been like if we had done more. But I also wonder what it would be like with a girl.I think about contacting men on Facebook that I think are gay but I am in Arab country and I am nervous.I do not know whether I am gay straight or bisexual. What would you do to know?