JEE Advanced

Hello! Ishan, Yes you can get admission in IIST with your rank. This is a good rank.

Do check the college predictor of Shiksha to get more precise answer:https://www.shiksha.com/college-predictor

No you can't apply for EWS category in JEE advance.

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.

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.

It's always good to give yourself a fair and proper attempt if you want that you should not feel regret in life for the cause. If you didn't took a drop and in sometime in life you felt that you can do that at that time, then you will feel regret for that. So, it's my advice that you should take atleast one proper drop in which your everything will be of JEE and IIT, nothing more or less than that.

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.

You can refer to the following for more information -https://www.shiksha.com/engineering/jee-advanced-exam.

You can check the following for more information -https://www.shiksha.com/college/management-education-and-research-institute-janakpuri-delhi-37434.