Welcome to the forum! Not to be a downer, but the only thing that works for weight loss is to burn more calories than than you consume each day. And doing the internal work necessary to figure out what it is about your habits, relationship with food, etc. that has been leading you to overeat and gain the weight in the first place. You have to make a lifestyle change that you can live with permanently or the problem will come right back.
I speak as one who has been there, so no judging...sincerely trying to be helpful. I lost 70 pounds several years ago by making unsustainable and extreme changes to my diet, then gained it all back quickly because I never really changed ME and never learned the habits I needed to maintain. This time I am on a better path, learning a new and healthy way of living. Over 100 pounds lost in the last couple of years and I feel like I am in control, know what to do to to maintain.
There's no weight loss magic in a green smoothie, though it is a healthy beverage. Can be as low or high calorie as you make it, just like any meal.