Hi Marry
Green tea is healthy in small doses, because it has great amount of coffein.
Other than that exercise is essential for proper weight loos, from my experience dieting and starving make your metabolism even worse, and sudden weight loss leads to yoyo effect:( I lost 20lbs for 6 months and I eat normally, but I exercise 4 times per week, I go to the gym, ride a bike and when I am bored and when I dont have much time I exercise at home with online personal trainers, web site is insha.pe and workouts are like using skype, so you just have to be disciplined, determined, and have a small goal for start
Wish you all the best!