JEE

For the year 2020 , 112 marks ( 28.28 % ) out of 396 was closing marks in general category. But this marks will vary from year to year depending on paper difficulty and the students who applied for IIST. In terms of rank , you can have target of getting rank under 10k as of now.
Hope it helps.

You can check the following link for more information -https://www.shiksha.com/university/iiit-hyderabad-international-institute-of-information-technology-53885

I would recommend you to make use of YouTube as well as some study material provided by some coaching institutes. You can borrow the study material from your relatives or some friend who have already passed his year.

Visit the rank predictor of Shiksha from the link given below-https://www.shiksha.com/college-predictor
and also sit in exams of few good private colleges.

Yes, NIT and IIIT take admission on the basis of performance in JEE Mains.

Because JEE is bit tricky which requires proper understanding as compared to other engineering entrance exam.

You can refer to the following for more information -https://www.shiksha.com/engineering/articles/jee-main-2022-registration-application-form-blogId-72813.

You can refer to the following for more information -https://www.shiksha.com/engineering/jee-main-college-predictor.

Because your marks must be less than the cutoff marks for the general category. That's why it only shows your category rank.

Hii Div, Admission to L D College of Engineering BE course is based on GUJCET rank, (not by JEE rank) followed by GUJCET Counselling. The institute-specific qualifying cutoff is announced after the declaration of the GUJCET result to manage the seat allotment process.