I gave myself total freedom the first week (and I ate a load of carbs/cheese/sweets)
Then I started using a fitness app (MyFitnessPal) try replacing ice cream with sugary and filling fruit (bananas/mangos/dates are great) Home made meals, plenty of veggies (buy a steamer, it's delicious 😋
homemade salad dressings. Foil cooked chicken or fish.
You don't have to completely stop junk food either, just work your favourite snack into your day/week.