if i were u this is what i'd do
start a weight lifting program,go 8-10 reps on excercise,never skip a workout
do cardio at least 5 times a week on a empty stomach before breakfast(if u dont have any machine,running,jogging or even jogging in place and jumping is cook,anything to get your heart going)
mon-fri i would not eat more than 125 grams of carbs,only eat carbs after u workout,but never starve yourself throught the day
fri-sat eat lots of carbs and protein,especially carbs
the key is to never miss a day...especially with the weight lifting and cardio,if u dont have weights , u can do cardio only,but then when u lose the weight u will look weak if u didnt lift weights,try to keep the diet consist too,