Just try to workout. At least 3 times a week and do some cardio like running or rope jumping for 30 minutes at least and try to change you eating abits
That's. A good question and there's no answer real answer it all depends on you. You might need to burn a few pounds of fats so.that your abs start to.show up
You just need to build your muscle and lose the fat around your stomach. By exercise that will build your core and by doing cardio. It will take time but it be worth it.