A final note: Your BMI is in the normal range, so there’s no reason to cut calories. Of my two suggestions, increasing daily exercise is probably the most important. Eating more carbs and protein is helpful for increasing your exercise capacity, which is why I still think it’s important to moderate fat intake, though there’s no reason to go crazy with it. From my personal experience, I can run faster and work out harder when I keep fat intake down to like 50-70 grams a day–while keeping carbs and protein higher.
For exercise, you might want to consider doing resistance training to build up some muscle. Do you have any experience with weight training? Do you currently exercise?