(10 points)I need help losing weight!! Please read below!!?

Soo after seeing commercials on tv on the insanity workout by shawn t, im determined to do it. Im 17 years old and weigh 230 pounds and im a girl. I have two months off from school and im willing to do this 60 day program. How many pounds do u think i can lose on this program? Will i look like a different person after this program? Do u think i can accutually lose inches on this program? Please leave any opinions and yes i promise a 10 point giveaway for the best answer, please help! Losing weight will mean everything to me! I wanna have confidence again! I just wanna lose alot of weight in my two months off and go back to school totally different in a good way! So pleaseeeee help!