I have wasted 8 months of class 11. Am I too late to prepare for JEE ?? Also how should I study to get a rank of 800 in JEE Advanced ??

Hi there!
Yes you can achieve your goals.to do so,you have to make strict routine which must be practically achievable.have strong command physics, chemistry,maths.to have command you need to solve ample number of questions.you must follow one book do go for more.it will waste your time.nothing else.
Hope this will help
Good luck

You still have 12th class and if will work really hard you can cover everything..
Don't loose hope...work hard you still have time..