Left shoulder surgery=one handed shooting by primary…
As others here, I had left arm immobilized after an accident and surgery. I was shooting irons then and just generally stuck with my then Gen4 Glock 19. Single mag pouch behind gun&holster. A reload I did at an IALEFI side match was as I’d been taught at Rogers: mag dumped, gun between knees upside down, new mag in, run slide forward by knee pressure/punching forward. These days I’d use an extended lever with my right thumb and holster before the load. Thinking about this a bit further, I might drop a little handgun in the strong side pocket as backup- I’d have to experiment and see about practicality. Streamlight has a frame button TLR7 now; I have however successfully run the standard switch with my trigger finger(carefully). This is where I can see another argument for a pistolWML.
Would probably stick with a dot, as I’ve run strong hand strings with no issues I can recall(thanks again,Bill Rogers). I would definitely do dry practice to sort things out, get comfortable and improve proficiency. Confirm with live fire,e.g., the shooting hand string on the 5yd Roundup, single shot draws to a 7 yard target, plate rack carefully @10-but I do that now.
Probably an important thing to think about is adjusting your awareness and planning now that one is one wing down. Just because you’re down one doesn’t mean you’re out…
Best of luck. Remember, a lot of folks successfully defended themselves shooting and hitting one handed for a couple of centuries or so.