Yoga X from the P90X Workout Schedule was the first contact I had with Yoga. While I expected something completely different (the X should have been a hint though..(no not what you think!)) and while I still have a love/hate relationship with that particular part of the workout schedule, it unmistakeably had the biggest impact on my fitness and life in general.
I already pin-pointed a lot of weakness and managed to improve and work with them thanks to my "Self Diagnosis by Videos and Picture"-Method. You should try it. However, as I mentioned, careful and if in doubt please contact your PT or specialist!