In the second week, you can eat a little shrimp, shellfish and crab (13 sweet lobster is not recommended) and stick to it for one month. It's best not to eat fish either.
Exercise or something, don't be too tired, after all, you don't eat much. Just do it as usual, without deliberate exercise, but you can't be lazy about what you should do.
Put some chocolate in your pocket when you go out, because you are on a diet to avoid fainting. Take one tablet when you feel dizzy.
I did this and lost 20 Jin a month.