I have been living for 3 years in Switzerland. I am an Asian and I easily make friends with all Swiss.I do not anticipate any problems with Swiss. Basically you should start the conversation with everybody. I basically make friends in my village. I went to supermarkets and make friends with supermarket workers and also housewives. One day I happened to choose a floor mat and a housewife start a conversation in German language. Again an elderly man also started conversation when I choose some chocolates for Christmas.At that time, I am unable to understand German language but he did some sign language. I happened to meet him after one week and he still said hello. Also the workers in the supermarket greeted me when I went to supermarket. Just smile and be positive.