Exactly what @hominid said. Weight loss happens in the kitchen; exercise is for your health.
Weight loss isn’t easy, but it is simple. For some reason, people insist on making it more difficult than it is.
You do not need cleanses, detoxes, “kick starts”, low carb, low fat, paleo, gluten-free, vegan, Weight Watchers, or any special exercise program to lose weight. It’s calories in vs. calories out. If you refuse to count calories, that’s your prerogative, but you have no clue how many calories you’re eating unless you count them.
Also, please don’t restrict calories by too much. Google “TDEE calculator” to get a good estimate of how many calories your body burns per day, subtract 15–20%, and that’s how many calories you should eat to lose weight.
If you have 25+ lbs to lose, 1–1.5 lbs per week is healthy weight loss. The closer you get the goal, the less you’ll lose per week, say .5 lb per week. Don’t be afraid to lose slowly, because quick fix weight loss strategies work, but they’re usually temporary.
Get the term “dieting” out of your vocabulary. If you want permanent results, you need to make permanent changes.
Walking and swimming are good, and I encourage you to do them, but don’t think you’re going to be able to out-exercise a bad diet with those exercises. Walking doesn’t burn nearly as many calories as people seem to think.
Good luck.