@serious. I haven’t tried any external aids and I agree that these seem extreme and rather cumbersome to me. There are lots of ways to practice balance that are fun. One way is to use a Bosu which is wobbly when you stand on it. But you can use it next to a wall or a chair so that you can reach out and balance yourself. I imagine there are lots of variations to do on a Bosu that you can find on the internet. The “trick” is to make sure you don’t lose your balance while using it. Before doing any of these things if I were you I’d check with my doctor first. Maybe physical therapy would be good too.

The Bosu is expensive but I’m sure you can find one to use at your local gym or a used one somewhere.

Bosu
https://www.bosu.com/products/bosu%C2%AE-home-balance-trainer