I focused on the foods I'd miss and found substitutes, EG cauliflower rice, 90 second bread made with ground almonds, and either halloumi fries or boiled then roasted kohlrabi,
I also thought about foods I can eat on a low-carb diet and celebrated putting cheese, butter, etc back in.
If you find planning hard maybe focus on a few meals you can eat?
My go-to meals are cheese for a snack, with a green salad plus an olive oil dressing if hungry, and either salmon or chicken with cauliflower and green veg followed by full-fat greek yogurt with a few berries. I know exactly how many carbs are in these meals so they are hassle free.
But if you are going to lower your carbs talk to your DN first as you may need to lower the dose to avoid hypos?