The short answer is yes, it is possible. However, I can tell you by your stats that you need to focus on losing some weight more than ab exercises. The only way to have 6-pack abs is to be quite lean. That means reducing your body fat percentage. The best way to do that? Personal Trainer. There are tons of exercise programs out there (like one person mentioned P90X), but these are generic and are not personalized to you. If you are not used to working out, you should try to consult a professional like a trainer, even if just for a few sessions. The thing that people most often miss when going for a chiseled physique is not watching their diet. Also to lose weight you have to expend more calories than you consume. Cut the body fat, while exercising regularly and it is definitely doable in 6 months.