Here's a
link you can use to look for Triathlon clubs anywhere in Switzerland. It seems that many of the clubs are for youth, but you could always try contacting them and they could point you in the right direction.
Of course, if you don't speak the local language yet then it might be easier just to use this forum to meet people for swimming, biking, and running...
It may take some time to sort out the best places to do these things around you and to find training partners, but overall I don't think you'll have a problem - Sport is very important here in Switzerland! There are so many beautiful places to bike and to run... I think you will love it.