How to reduce a large stomach, preferably with abs

Start with jogging, remember, no matter how slow you run must adhere to more than 10 minutes, because when running, the first ten minutes are just consuming your carbohydrates and whatnot, so a long time of aerobic training is necessary. When your big belly is gone, you can do anaerobic training for your abdomen (i.e., muscle building). As for anaerobic training methods, the internet is full of them. I wish you success.