Hi, it can be a struggle at first. I don't want to duplicate what's been said already but the wobbly feelings you're having, if my experience is any guide, is firstly your bgs falling from a problematic high level to a more normal one, and secondly the rollercoaster ride you create of low-carbing, but then adding a lot of carb via porridge and syrup. It's the resulting bg ups and downs that make you have the effects you describe.
I really like porridge (with honey, whisky and cream for preference) but I last ate it over three years ago. It's just no good for me and I prefer my normal bgs and no diabetes symptoms to porridge.
I try to have a good mix so that I don't need to eat the same thing more than once a fortnight - my other half is not diabetic but is happy with having fewer carbs so that helps. In a given two week period I'll probably have a steak/chop/lamb twice, maybe two or three variants of a chicken curry (maybe six meals there?), grilled fish and a fish stew, a chilli, omelettes with various bits of things added, a mince and peas kheema mattar, a proper fryup (eggs, bacon, 98% meat sausages, black pudding, mushrooms), cauliflower cheese and bacon, bolognese sauce (without pasta, extra mushrooms instead) cheese and charcuterie etc. For veg I do creamed leeks, cabbage, swede, spinach, cauliflower, that sort of thing. Using a variety of herbs and spices stops things tasting too samey.
A lot of those meals I batch cook in quantity where I can so there's always something in the fridge. I also plan well ahead - nothing last minute.
Best of luck. This is the worst part.