Hello Candidate,
Every year 2.24 lalh students qualify for JEE and  to secure your seat at NITs your rank should be below 40K. So it's harder to get a seat at NITs than to qualify JEE.
If your rank is below 40K, you'll get engineering at NITs, otherwise it's not possible.
All the best :)

Sorry but admissions in NITs are done on the basis of jee main score card only. You could not get admission into them directly and there are not any management seats in NITS either. So I would suggest you to either give exam next year with better preparation or take admission into any other private college. No government college will give you admission directly you need to be eligible to get that.
Thank you.
Hope it helps.