@intersan
I've had fiber optics lines at house and shop since 2000 perhaps.
And running every version of Windows, MAC, etc since Windows 2000.
Live and work in Maine, here it's called DSL (Broadband service), beats heck out of dial-up and a modem.
As long as your computer has an ethernet card (looks like wide modular cord for telephone) or WiFi card if desktop/laptop should be no problem.
For TV connectivity , you only need a coax type connector for antenna input vs. old school rabbit ears type connector (screws).And their modem/Wifi/TV box.
Generally all in one box.
If you have no ethernet on computer, a card that plugs in desktop pc is maybe $15. Most newer computers have them built-in so, I may be off on price.
Laptops cable/WiFi dongles $10/20. Depending upon speed, and Operating system you use.
You didn't say, most are backward compatible to Win7 or 8.
But, I hope you have a good antivirus and still get updates from computer maker and operating system.
Windows 7, I think is end of life or will be in January 2020. No more security updates from Microsoft.
https://www.cyberscoop.com/windows-7-end-of-life-forescout-op-ed/
Lengthy answer I know .
*ps - if you can't buy new system, used gear at pawn shop or from places like Tigerdirect.com are relatively cheap with newer Windows 10 operating systems and in most cases can use your present monitor.
If it doesn't still makes sense, ask. With a little more information supplied by you.
Haven't really looked at older CRT TV in awhile. LED/LCD/etc flat screens no problem. Input might require coax attached to antenatal leads (ATT or you supplied).
Froze
And yes, after long days/nights, I'd still like to swing these hunks of glass , plastic and silicon against the nearest wall Come on retirement!