Hello,
Congratulations for your results!!
Yes, you can qualify for IIT and NIT. You may score not so well in class 12th but, you can qualify competitive exams. I know few people who did not score good in class 12th, but qualified NEET and JEE. So your class 12th marks should not hinder your career.
But you should score more than 60% as an eligibility criteria and that you have done. So no worries. Now you should focus on further studies.
If you want to get admission into IIT or NIT then stop thinking about 12th result and start your preparation for JEE. Widen your horizon and start solving questions and clear your concepts for competitive exam.
Hope it helps.
All The Best!!
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