Hello,
With such low percentile you may not get seat in NITs or qualify for JEE advanced in case if you belong to General category.But if you belong to SC/ST category then you may have chances of qualifying for JEE advanced.So if you qualify prepare well for JEE advanced if you want to get admission in IITs.If not you can prepare for JEE main April session and perform well.You can consider joining in other private Institutes which accept JEE main score.
Your expected rank can calculated using the formula given below
(100-your total percentile)*869010/100
So it will be
(100-65.99)*869010/100=295550
You can predict the college which you may get by using the link below

Hi
Gururaj, as your percentile is not good I suggest you to prepare  for jeemain April session where you score good marks, then surely your percentile will get increase.
All the best

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