There are on Demand and Live Streaming options which you can cancel and restart anytime without contracts or penalties.
In other words you can subscribe to follow a particular show and then cancel your subscription after the finale!
A good place to start is in thinking about what you actually watch?
Local Channels, Sports, Series, Movies?
You will need a device to watch your subscriptions.
Smart TVs, Game Consoles or Blu-ray Players can have apps installed for streaming.
Your other option is to buy a new streaming device: