Go here -
https://thestreamable.com/
1) You gotta look at the streaming options available and pick the best for you. Theres PSVue (don't need a playstation for btw), YoutubeTV, Hulu+LiveTV, Sling, DirectTVNOw, Philo, FuboTV, etc. The first 3 listed are probably the best options, but basically you have to look at what are the most important live tv channels for you and choose off that (though you can just do the trial or use all them for 1 month and then switch to see what you like best...NO CONTRACTS). I will say PSVue is 100% Best for NFL. **** you can use 2 at once, then certain months if you don't care about the sport you don't use any and just use Netflix, and stuff like that... But you need to know what channels you need. For instance if you NEED every NFL game, not many carry NFL Network, BUT Amazon carries all but 2 thursday night NFL games, and CBS, FOX, and ESPN carry the rest.
2) You need something to actually stream what you're watching to: Nvidia Shield TV, Amazon FireStick/Cube, AppleTV, Chromecast, Roku, and a bunch of others, but those are the main nes. But it's worth knowing what each does well/bad. For instance, Hulu wont update their app on AndroidTV, so Nvidia Shield doesn't get Hulu Live TV, but if you don't want to use Hulu, the Shield is by far the best option (most powerful, customizable, and you can play games on it). Then you can't use Youtube or YoutubeTV on any of the Amazon devices, and you can't use Amazon's PrimeVideo on Google's Chromecast. Also the Chromecast doesn't have a remote, you SOLELY control it through your phone or tablet with the google home app. The AppleTV I think works with everything, but if you don't use apple products, it probably doesn't make sense to have this one either. The Roku is probably the most general out of them all, good for pretty much any service...
3) HBO/Showtime can be added as a standalone service regardless which service you pick, as can ESPN+, CBS All access, NBC universal, and a **** load of others...just like Netflix, PrimeVideo, Hulu (without LiveTV), and soon to be Disney+ and Apple service......The only thing that really matters here is that Amazon Prime doesn't work on Chromecast. Everything else should work on every device. PLUS if you're get Sling I don't think you get CBS or ESPN, so maybe it's cheaper to get CBS and ESPNs standalone app and one of the Sling packages...