It sounds to me like you are a good candidate for streaming TV. You could watch on a PC, laptop or tablet, and get access to as much or as little content as you'd like.
Streaming services are broadly in two categories: subscription video on demand (S-VOD) and over the top linear television (OTT-TV). In the VOD category are services like Netflix, Amazon Prime and Hulu. And in the internet TV category, services like Sling, Vue and HuluTV.
That last one bears mentioning: Hulu is subscription video on demand. HuluTV is a package of traditional TV channels, PLUS on-demand content. YouTube has launched YouTubeTV - another naming confusion, but YouTubeTV is a bunch of traditional pay-TV channels, whereas YouTube is cat videos etc.
Given that all of these services come with a free trial, I'd suggest you give one a try, and Sling TV has a one week trial available for Sonic members at http://Sling.tv/sonic
Basically TV used to be simpler: just get Cable or Satellite, and pick how many channels you wanted.
Now, you choose a couple subscription video on demand services like Netflix and Amazon Prime, and then combine those with one streaming PayTV service such as SlingTV or YouTubeTV, where you choose how many channels you want.