legs back p90x

Im 16 will P90x help me?
Im 6’3 275lbs and im 16 years old if I go on P90x will it help me out at all? Im not horribly fat and I have some deffinition on my arms and back and legs but thats it.
it shuld , ive personaly never used it, but i know it will work. well its pretty convincing.
P90X Legs and Back