Is it possible to lose 30kg in 30 weeks and how?

I am 12 years old, I am 152cm tall and I weigh 81kg. This means I'm obese, I wanna lose weight by the end of this year. I have been trying but I keep falling of the wagon, I want a fun and enjoyable way to lose weight. I currently do 31 hours of hip hop dancing each week, I started a week ago. Please help, no hate or rude comments please! :)