Sir, I have wasted starting three months of my jee prep in class 11 and have also missed homeworks. How can I manage my studies and prepare well?

Hey don't worry you have wasted 3 months and that's ok

Now you would starting from the very beginning so its really important to clear your concepts well and for that 1st of all you have to clear your pending work as soon as possible or else that will make your confusions and doubts list longer and longer 

And then keep practicing 

Refer good and quality books

And success will be your's

Hope it's helpful for you !!!

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Thanks