Experts say that you should eat at least two meals at a time, eat at most two kinds of meat, and eat more fruits and vegetables (CCTV's The Road to Health says).
Since you have a big belly.
Just do reverse sit-ups It works. I tried.
Lie on the bed (or on the ground) and then lean back, put your hands behind your head and keep your legs straight (you can ask someone to hold them for you). Remember that the key is to use the first half of the abdominal muscles to exert force.
It may not be very accurate. Call me if you have any questions.
I wish you success in losing weight!