I'm also 60. I just discovered FitDay today, signed up, and started keeping track of my food and activity.
I have been on every diet there is including high protein, Slim Fast, supplements, Weight Watchers, liquid protein, etc etc. Over the course of 35years I dieted and steadily gained weight. Several years ago I decided I was done with dieting forever. When I did that, my weight stabilized. Two years ago I became vegetarian (occasionally eat fish) for animal cruelty reasons and since then I've dropped 12 pounds without trying. (A very slow rate of loss, but faster than I gained the weight!) I think that having limited choices helps me to make better choices. It's like this: if I go into a shoe store and there are 300 pairs of shoes, I come out with something that might not work for me. If I go into a shoe store and there are 12 pairs of shoes, I have no problem picking the right ones.
I'm hoping that FitDay provides a bit of structure and accountability for me.
Good luck to you!