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i have a real problem opening in day game
man seriously the best thing to do is just go in there and do it hey, I was in Brisbane walking around today, I warmed up on old people and got all talkative, then opened like 20 sets , just remember to experiment and have fun. Worst case scenario you will have a laugh and learn something. But the only real advice anyone can give you is toughen up and get in there son 
its all experience, your not alone everyone feels it, just have a crack brother, let us know how you go