This is not a very good way to lose weight. Not the seggs, part; that may actually be fine. The eating part.
Have 3 meals, but cut down on portion sizes. No soft drinks, only water. And zero snacking. That'll decrease how much you're intaking. And that's the most important part, because it's easier to reduce calories consumed than it is to burn calories.
Do some exercise based on your physical capabilities. You don't need an insane routine for losing weight. If you're obese, go for a walk. If you've got only a bit of flab, jog a little. Your normal body processes will burn calories in order to fuel your organs, cells, breathe, etc. Exercise is a means to push that number above your consumption, so do a bit more than enough.
Basically, aim for a calorie deficit, then persist in the deficit.
And most importantly, have someone or some people help keep you accountable.