Sorry, @AustraliaFlights , I didn't mean yo be too critical, and I realize it can get confusing! To keep it simple...
Cut out sugar, refined carbs and UPF as much as possible.
Aim for 50% plants + 25-30% protein, plus some complex/unrefined carbs (lentils, chickpeas, quinoa), and use just a little healthy fat such as EVOO.
Intermittent fasting, e.g. eat only between 11 am and 7 pm - 2 meals and 1 snack. Or, if this doesn't work for you, split 1400 calories between the 3 small meals.
For example, in a day you could eat c. 1400 calories:
1 chicken breast
1 can tuna or 2 large eggs (omelette or boiled)
200g quinoa or lentils
400g vegetables/salad
100g fruit
100g full fat Greek yoghurt
1 tbsp salad dressing
I'm not suggesting you calories count, but use these kinds of quantities to give you an idea of how much food is 'not too much'.
To put this into context: as we get older, especially post-menopause, we need less food. I'm quite old, and if I ate more than the above, I'd gain weight. However, because my diet is rich in protein and plants, I don't actually feel hungry!
I hope this makes sense and isn't too overwhelming.