Since you seem to have no health issues, and you seem to have portion control in mind, I would suggest take a few weeks and log/track your food, honestly and look up if you need to the calorie counts, and fat, carbs, sodium, sugar, protein,etc., and take an honest look at what you are eating.
Not all foods are created equal.
Honestly, weight loss and maintaining, is done in the kitchen and fitness is done by working out.
Ironically, losing and maintaining, takes a lot of time in the kitchen, playing with food. While time consuming, playing with food and tracking and then using that feedback, is what works.
For myself, I eat a lot of lean protein, more than most plans call for. However, I have a very active job and I strength train, so I need my protein. Lots of lean protein! I eat tons of fresh veggies! I garden, and can and freeze. Fruit, not so much. Fruit, while I like it, does not agree with me very well. Monkeys with my blood sugar, and makes me hungry and cranky.
Anyway, take a breath, take some time to honestly look at WHAT you are eating, and tweak it from there.