Diet Tips

I’m planning on going on a diet. I don’t plan to shrink my appetite, but to eat healthier foods. I want as much exercise as I can get. My two questions are:

1. What do you eat to be on a healthy diet?
2. What do you do for exercise while on a diet?

Thanks

I have early stage graves disease and it has made losing weight one of the most annoying and frustrating things ever. I have cut out fast food, eat less chocolate, eaten more healthier foods, I walk everyday and nothing. I have maybe lost two pounds but I need to lose more than that.