Lose weight by eating less salt! Salt sensitivity is contributing to your excess weight and 'fat belly' and also to possible liver and kidney problems, etc.
If you are a drinker, you can lose further abdominal fluid retention by reducing your alcohol consumption. But the most important thing is to eat less salt. - So don't snack on salty crisps, salted nuts and the like.
See Sodium in foods
and also FAT RETENTION