You're staying at Westeinde. That is deadsmack in the middle of the centre. Accross the national bank and in walking distance of the two squares with the most bars, the Leidseplein and the Rembrandtplein. A tip, walk around the Albert Cuypmarkt (in the Albert Cuypstraat). That is around the corner there. This is a street market full of stands. And try the stroopwafel, which will be sold over there. That is a biscuit which is very famous in the Netherlands.
But OK, that is the touristy stuff. For the public transport you can check http://9292.nl/en. And yes, as you can see, this website is