I added an Amazon Firestick to an older 19" 1080P non-smart TV in my RV, and love it. I couldn't find a 19" 1080P TV anymore.
The Firestick is so good, I bought another one for a Samsung smart TV, because the UI is better than Samsung's. And this way, it's all on one account and both have the same remote control button layout. Plus, the Alexa PTT voice command feature built in the remote is sometimes useful.
One last comment that bears attention. If you're on a capped data plan, the Firestick can adjust the download speed under Settings/Preferences/Data Monitoring/Set Video Quality. It doesn't tell you the exact download speeds but gives you a choice of Good/Better/Best. Using "Good' dropped my daily usage from 10GB/day to 2 GB/day. The nicer weather also helped
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