I need held on how to drop 70 pounds in less than a year

I am 16 years old, 6'1, 216 lbs, and struggling to lose weight.

I used a fitness calculator and found that I'd need to atleast eat 1500 calories and 100 to 150 grams of protein a day, walk for 3 hours, run for 2, and workout for another 2 hours if I wanna lose 60 lbs in a year.

Is that accurate?

I need some guidance desperately.