Got hired as a photographer for a foreign wedding. Need some help

This is going to be my first time traveling abroad for a wedding. I was recently hired as a wedding photographer for my cousinís friendís wedding and theyíll be sending me abroad just for the occasion, free accomodation and the works. Iím just really nervous about the whole thing though so I might as well ask some random folks who, hopefully, have some experience and advice on me on what to expect and advice. Maybe when this is over, I can start a portfolio on my international bride clients and see where this takes me in my career. Iíll have to start stepping up my game and advertise myself to reach around the world, yeah?