I will start university in September and I want to continue practicing martial arts. I've been doing shotokan karate for 8 years now and I have a black belt exam in December. At the university there is no karate club but there are other martial arts clubs and I've decided to start japanese jiu-jitsu. I'll be studying abroad so going to other clubs than the university's is not an option because I don't speak the language and even though most people there speak English I don't want to put pressure on the instructor and his students plus I want to experience and train in a new art and expand my techniques and knowledge.
I want to know how I should behave at first when joining the club, if there is any etiquette to be followed (I've never changed clubs), if I should tell them that I've been doing karate (I don't want them to think that I'm boasting about it).
I excuse myself if this is too long or there are too many questions stuffed in here.