In fact, anything can be done, depending on whether you want to see your abdominal muscles quickly, or whether you are eager to gain muscles first.

Want to see abdominal muscles quickly, do more aerobic exercise and lose body fat, but the muscles are not obvious.

If you want to gain muscle, do more anaerobic, but don't ignore aerobic, eat more, and don't be afraid of gaining weight. If you want to build big muscles, gaining weight is inevitable, and then reducing fat later.