When I had my stroke 3 years ago I was diagnosed with Type 2 diabetes. I was WELL into the diabetic numbers. I knew that the only way change would be sustainable is if I made it reasonable. No cutting out any single food group. Things like Jenny Craig or Nutrisystem etc wouldn't be for me, I can't do that for the rest of my life.
I started tracking my calories on a popular tracking website (not sure I can share the name so Mods, delete if necessary). I use MyFitnessPal.com. It lets me watch all my macronutriets and plan them. Macros as in Proteins, fats, and carbs as well as micronutrients such as fiber, potassium etc.
When I was diagnosed I set my carb limit to 130grams per day. I wanted high enough not to be constantly frustrated, but low enough to get numbers down FAST. I was put on oral meds and between the two within 4 months I was out of the diabetic numbers and back down to regular blood sugar levels.
My carbs are now set at 200 grams per day for sustainability. I eat what I want and as long as I stay below 200 (or very little above it on a special occasion) I"m happy.
THe only food I cut completely out of my diet was soda. 99.99% of the time I'm drinking water. I eat ice cream, cake, candy, pizza, frozen dinners (providing they are low(ish) sodium), fruit in amounts beyond imagination, etc.
So far I'm 140+lbs down
, no longer diabetic, no longer on diabetes meds, and I'm quite comfortable sustaining from here. It's not a struggle at all since I don't deprive myself of anything. I knew that fad diets weren't the thing because the minute I stopped doing that.. I'd gain weight back AND possibly mess up my blood sugar again. I couldn't have someone watching me for the rest of my life (had to be accountable to ONLY myself). Having food delivered woudn't work, the minute I stopped them I still wouldn't have learned about portion control and how to cook healthy meals so I'd start gaining again (been there, done that, had the stretch marks to prove it). I had to learn to feed myself properly, control my own appetite, and motivate myself. If I lose more weight along the way, great.... if not I'm VERY OK with where I am now.
So, even though you're not after weight loss you still need to make your changes reasonable and sustainable. You can't live the rest of your life wishing you could eat a donut and know you can never have one again... it's not reasonable. Instead make room for the things you want, whether it be calories or carbs