FYI if you don't already know, you will need BlackBerry data service from your mobile network provider. This is true for the legacy BBOS devices (and not the case for BB10 or BlackBerry Android).
Your first place to check for apps is BlackBerry World from the device.
Be aware the device is very old in tech years. You will have to make allowances, probably. Posted via BlackBerryForums.com Mobile