Please watch this webinar on Creating a Portfolio for Indian and Abroad Universities. This should help you out

Brilliant.org is a great website/app for maths. Philip Carter, mensa books, and Arihant books are great too.

Please watch this webinar on Exam Strategy for NID 2022 & 2023. All the best!

They will give you a small booklet in which you have to fill your details and you can start drawing on the paper. Don't worry they will give you all the instructions you need

It is certainly real if the object is virtual

You may get some answers from this webinar - e-Meet RV University

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