YESSSSS!!! That’s really the whole point of Roku....you are cutting the cable cord and then streaming, via your INTERNET connection, with your Roku.
If your TV is somewhat new it should have an HDMI slot, somewhere on it (usually on the back side).
You buy a Roku for practically nothing, these days. We prefer the newer one that comes with a voice controlled remote! You can tell the remote what you want to watch....from channels, to shows, etc.
Here’s the model we like....you can also check big box stores for sales/better price, but this is not a bad price, from Roku...
https://www.roku.com/products/streaming-stick-plus
Easy peazy. I’ve installed several, myself. Only way to go....so many channels, MOST that are free.
Mike Lindell is so so so so so so so so AWESOME!!