I would personally try to avoid anything with sweetners in, things may taste 'not so good' at first, but your tastebuds will adjust (for the better) after being force-fed sugar for many years; I hated greek yogurt when I first went low carb, but now love it. I find anything 'sweet' so overly sickly now, like pinching a single chocolate button from the kids, which is good as I couldn't eat anything I shouldn't now without feeling rather 'ick.
As for the 12g carbs - depends what you are aiming for - I try to keep each meal below 25g, so if I was having salad with a piece of chicken/steak, then the pudding would be 'ok', but if I was having a more carby main dish, I would probably just have something with minimal carbs if I 'needed' something afterwards.
I don't have the patience/talent of
@TriciaWs so I'd just have some berries with greek yogurt (for the protein) and a square of 90% Lindt on the side