Although your goal is to highlight the abdominal muscles, I suggest you make a plan to cover all muscle exercises, especially the large muscle groups. Whole-body muscle building training is beneficial to improve your overall metabolic level and reduce fat. Of course, in order to lose fat, itchy exercise is indispensable every day.
Why do you want to lose fat? If you don't lose weight, no matter how well you practice your abdominal muscles, they are also wrapped in fat and can't be seen from the outside. Therefore, we must reduce fat.