If you are expecting me to say, from 8th grade or something like that,
You are wrong!
According to me, one should make the best use of the facilities , study material ,etc. one has at present.
But yes, Don’t forget to give your best !
Either give your 100% or just don’t start!
The choice is upto YOU.
As far as my views are concerned, If you start preparing for NEET from Class 11 ,its absolutely alright.
But mind you, finish with the same intensity you started.
Ofcourse you won’t be able to start studying for 8 hours daily as soon as you enter class 11, but you can surely start studying for 3 hours for the first month, then 5 for the next few weeks , then 7 and finally 8 to 9 hours a day.And continue studying for 8 to 10 hours daily till your D-day. And I bet you, no one can stop you from achieving your dreams.