I’ve been having kefir on and off for a couple of years now and it seems to suit me quite well. Main thing I’d say is check the labels carefully because some of the flavoured ones have far more sugar than people realise. The plain natural kefir is usually the better option and I tend to add a few berries or some nuts myself rather than buying pre-sweetened versions.
For me it doesn’t spike levels much at all compared to normal yogurt, but everyone reacts differently so it’s probably worth testing after eating it a few times just to see how your body handles it. Gut-wise I definitely noticed a difference after a few weeks, less bloating and generally felt better digestion-wise. Congrats on getting back into non-diabetic range as well, that’s a brilliant achievement.
