Burning fat is an all-body process, and you can't target where you lose weight from. Energy is delivered to the muscles via the bloodstream, NOT from being absorbed from surrounding fat stores. You don't need to do arm or belly exercises - anything you do to reduce fat will reduce it in these areas too.
For most people, losing weight is 80% nutrition, and just 20% exercise. So one of the best places to start is just tracking your food for a week or two. This can really help identify where your calories are coming from, and where you might be able to knock out a few hundred calories without feeling deprived.
In terms of exercise, definitely talk to your doctor about what you can do safely, but slow walking does sound like a good place to start. But as with most exercise, it doesn't matter so much WHAT you do, just that you do it regularly.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
| current weight: 178.0