I’m a little late to this party. But as I’ve heard said “You can’t outrun a fork.”
Everybody is different, but for me, also 61 years old, I have to monitor what I eat else my weight creeps up. There are many food logging tools available. Weight Watchers happens to be what works best for me. Using food and therefore effectively calorie logging, you can find those foods that really work against you in controlling weight. No big surprise, the more processed the food and the more added sugars and fat, the worse it is for trying to control weight.
I think if you simply add more exercise, without monitoring your food intake, you’ll end up eating more and won’t lose more weight.