A macronutrient diet is the best diet you could start. It will leave you feeling energized with minimum food cravings and no hunger. Other diets are not as sustainable and are hard to follow. This is because you are forced to give up the foods you love and completely change the way you eat overnight.
For as long as I can remember, I've been told that it's paramount to load up on carbs before any kind of physical activity. As I've gotten older, wiser and tried things for myself, I've realized that this is complete overkill. In most cases, eating carbs before working out is like filling up a near-full gas tank and watching excess gas spill all over the ground.