Hello Neuon
Dont be afraid becuase this is your first time to talk with him. if you have much time to stay close with him. i think you should try to speak with him eventhought it is difficult. and i think you have ur own ways how to understand what he say. i know we are not native speaker , so we can't catch all the words that native speaker said. i try to understand what he wand / need. and then try to make full sentences when you talk with him.
'' if you clash with giant,you dont have second chance" i hope you understand this proverbe.
From Serirath
