Martee A suggestion look at Positive Impact Golf written by Brian Sparks a book (paperback or Kindle) available on Amazon and a swing technique that is about using as much of a full range of motion that your body allows you to do. It is NOT a resistance modern PGA swing. Philip Sparks now runs his YouTube channel as Brian has passed away. https://www.youtube.com/@Easiestswing/featured
You probably can learn enough by reading the book and watching videos to help achieve some ability of a smooth non-resistance swing. I think that's the key to golfers with health issues is that they maybe trying to swing with too much resistance to form power formed from prior golf experience.
Manuel De La Torre is the other suggestion that is somewhat like PIG. Manuel played into his 90's at a modicum of success over his senior years. Manuel's book Understanding the Golf Swing is also also available on Amazon.
Both PIG and MDLT swing are timing swings based on some shift. The other swings that may work are not weight shift swing guys like Jim Venetos and Tom Saguto are more static over ball and set up based. You'll have to figure out what works best for you.
In any case from one senior to another I hope your health is better and you get out on to the green grass this year!