The most nervous experience

You can have a good command of foreign languages only if you use it.
I was one of an oversea student in Korea.
I raised would raise my hand and speak during my class activity activities without hesitation. Of course, I felt irritated because sometimes I could not sometimes make myself understood, however, thanks to speaking actively, my korean was going to be improved. My doctor got surprised with by me because his image for Japanese is being shy and passive.
But, there were some times that I got nervous. It is the experience that I had never done even in Japan. That is not the issue involved with languages.
For example, I had never been to the a hair salon in Japan. I always go to barbershops.
I do not care about my hairstyle and I just want to keep my hair short and clean. So, I did not go to the hair salon.
I did not know what kind of place a hair salon is. I entered the hair salon in Korea while thinking ' Might a man enter here?' and ' What should I do if it is very expensive?'.
I think this experience is was the most nervous than all of it in out of all of them Korea. For practice to speak Korean, I should have tried a difficult order to at the hair dresser at that time, but because I was warried worried about speaking properly, I just said ' Could you cut my hair shortly?'
I have gotten used to that now.
We should have many a lot of experience before we go abroad.
What is your nervous experience? Please let me know.