If you want beautiful lines instead of thick lines, I suggest eating protein in food. Generally, protein powder increases the girth first.
Eating protein powder is best not to do aerobic exercise but to do equipment exercise (reducing your muscles, eating protein powder is not effective). This is not true. There is no conflict between aerobic exercise and instrument exercise in fitness exercise. Doing aerobic exercise first can not only burn calories, but also promote the heated muscle groups to get good muscle exercise.
I suggest you do aerobic exercise first, with fat loss as the first goal. The exercise of equipment can be done locally first, and the exercise with small weight can reduce fat first. Leftover is a medicine for fitness and fat reduction.