Hi,
Here what has worked for me.
The first thing is to sort out your diet. Like everything in life, if you want result you must put constant effort. Avoid process dood as much as possible. Do not eat crisp or bred, butter, cheese.., only drink water, cook your own meals with vegetable and grilled meat. Only snack on fruit like apples or bananas
In terms of exercise, find an abs exercise you like doing which is not loo hard and do it every day. Try to do a bit more of ot every week. I do dish rock and I love it.
Finally associate your effort with an image of a calvin klein model you like. And repeat to yourself that you can have this body. Brainwash your mind with it. Every effort brings you closer to that image. After few weeks you will look forward to make these efforts.
You should see a difference after a month.
Good luck buddy!