A healthy diet and exercise can change the way the body stores fat, but the only reliable way to lose it anywhere on the body is by burning more than what is stored overall. So, any exercises that burn more calories than are eaten are best.
It’s all about your diet and lots of any type of aerobic exercise. Jogging, biking and squats is where I would start. Lots of squats and eat whole foods you prepare yourself in small regular meals. Think of your body as a machine that needs maintenance and the quality of the fuel you consume will reflect on the overall fitness of that machine.
For long term success first concentrate on building muscle strength and general physical fitness. Losing the extra fat is important also and as you become fitter and start living a more healthy life style, the extra fat will slowly decrease. This will not be quick or easy but well worth your efforts.
I’m a big believer in weight training and floor exercises, but no situps. They’ve been proven ineffective. Muscle uses more calories and so the more muscle you build the slimmer you will be overall.