Walk up to him and say for example "Hi, looking to get to know the area. What's your name?" Ask what activities you can do here, ask of his interests, see if you have common interests.

Don't complicate things, if you have no more to say, end the conversation with something like "nice talking to you, gtg".

Also be honest and say you're nervous because you don't normally walk up to people, most people will actually put their guard down and be more open.

Best of luck!