While you might not be 'deaf', I'd be prepared to put money on an assessment showing that you're 'hearing impaired'. My friend never thought of herself as having a hearing problem until someone from the local council contacted her to say that her neighbour had complained about the volume of her TV set. The lady from the council visited my friend and asked her to let her hear how loud she normally had her telly set to. She then suggested that my friend needed a hearing test which, as expected, showed that my friend's hearing wasn't too good. An NHS hearing aid soon made things a lot easier for her (and for her neighbour).
Coming back to your main question though . . .
Bluetooth is now a standard feature on the vast majority of soundbars on sale but you only need it if you want to be able to connect your mobile phone (or other Bluetooth-enabled device) to the soundbar so that you can play music on your phone (or whatever) through the soundbar. You don't need it to connect the soundbar to your TV (which will be done via a cable).
The cheapest soundbars, such as this one
https://www.currys.co.uk/gbuk/tv-and-home-entertainment/dvd-blu-ray-and-home-cinema/home-cinema-systems-and-sound-bars/logik-l32sbt17-2-0-sound-bar-10157451-pdt.html
often connect to a TV set using a 3.5mm cable. That means that your TV set must have a 3.5mm headphone socket to connect it to (unless you use some sort of adapter). They also have quite low power ratings. The one in my link is rated at 16 watts, which should be enough to fill a typical living room with sound but a soundbar with a higher power rating not only gives more volume but is likely to give better sound quality too (because it won't be 'pushed to the maximum' when in use).
A slightly more expensive model, such as this
https://www.currys.co.uk/gbuk/tv-and-home-entertainment/dvd-blu-ray-and-home-cinema/home-cinema-systems-and-sound-bars/jvc-th-d227b-2-0-compact-sound-bar-10157471-pdt.html
provides more than enough power for your needs and also has an optical connection. (So, as long as your TV has either a 3.5mm headphone socket, or an 'optical out' audio socket you'll be able to connect it up).
If you need guidance as to which connections your TV has available for connecting to a sound bar, please provide the exact model number. (It's on the back of the set).