Go Kaleo’s book ‘Taking up Space’ also explains this clearly….how you need to eat enough to support your weight and activity levels, then make very small adjustments in calorie intake and exercise…even just by adding daily walks and dropping 100 calories. This is without banning any food group but eating what you enjoy.
The other thing is that the net weight loss result from this regime should happen very very slowly. I am 58 too, have dieted off and on about 30 years, found Matt’s work around 4 years ago and have been gradually incorporating his advice and findings as they have developed and altered over that time. I finally have a good body temp but am feeling too fat. It’s a slow thing but my goal is more about overall health and wellbeing than weight and appearance, much as I’d like not to be fat-bellied!!