To beginners having two languages doesn't really help that much.
For me being able to speak English with any real thought makes it really easy to communicate with people not from the Netherlands. But besides English you basically don't have to know any, since its basically the language everyone speaks (at least a little bit)
Although I went to France once in a people where tourism was basically non existent and me trying to speak English really did help because they couldn't understand me. Lucky I have my girlfriend who could speak a bit of France because I would have been lost there