You don't need cable to use this stick. All you need is Internet.
My house doesn't have cable, satellite, or other wired source of video. We have a TV antenna that gets us local channels.
You can get content using Amazon Prime - some of which is available at no charge.
You can use Pluto (ask Alexa to find Pluto, and then install it) for a variety of content.
You can subscribe to Sling and get many of the channels that are offered by cable providers - all over the Internet. (Sling allows you to view on three devices at once - your TV, your phone, your computer(?)).
You can also add Mobdro and Kodi.
Most Amazon (.APK) programs will work with this Fire TV Stick -- just don't overload it with stuff you don't need or won't use.
Again - no need for cable - it can all be done over the Internet (as long as you have WiFi)