If your measurements are correct, your present weight
is underweight for
your height. 61kg is the proper weight for
your height. A healthy way to eat is a Heart Healthy diet which means a moderate fat diet to benefit your body. Moderate fat diet means = use polyunsaturated (omega 3, corn oil, nuts, etc) fats and monounsaturated (olive oil, canola oil, peanut oil, etc) fats, no saturated fats (high fat snack foods, butter, fat spreads) and no trans fats.