Basically if there were a miracle drink that people could drink and lose weight, I think whoever made that drink could buy Microsoft. In other words, it's a dream, but not a dream that was ever realized...
To lose weight you should spend more calories than you consume. To do that you should increase your physical activity and reduce the amounts of food. However, to do that in a safe way, you should set yourself some realistic goals. What you're saying sounds like a good plan, so probably the best way for you to go about things is to get in touch with a dietitian who will set you a plan, and sign up at your local gym.
I strongly recommend that you not be swayed by "magic tricks" because they don't work.
Good luck!