Our Firestick simply plugs in to a USB port on the back of our fairly new smart TV. It even came with a little pigtail if the connection point is tight.
There is HDMI as well, but wireless works just fine.
We have never tried using it on in the RV while camping, we bring a box of 5 dollar Walmart DVDs to use in the older TV on the wall.
Streaming burns up huge data, and I only have 2 gigs with my phone so don't even bother trying.
But at home the possibilities are many. My grandsons graduation was streamed live on Zoom. I brought it up on my laptop and sent it wirelessly to the TV.
The array of content on Amazon Prime is excellent. Something for every taste.
And whether you set up wireless or by a cable, it can be done with ease.