The Public Transportation
Public transportation in Prague is very convenient and very reliable.
The closest metro station is Staroměstská (A-line = green), the closest tram stop is also called Staroměstská (tram 2, 17, 18).
You will find more detailed information on the public transportation, including fares here.
Find the best connection that is available within the Prague Integrated Transport system in the PID app. You can download it for free in GooglePlay or App Store.
Getting around by bike
Bikes finally start to be a common mean of transport in Prague. There are few bikesharing companies, such as ReKola or NextBike and also some bike rentals, e.g. Okolo.
More detailed information and maps on getting around Prague by bike are here. (And there is an app, too – in GooglePlay or App Store).