Indian Institute of Technology, Delhi

Your expected JEE Main AIR is about 22278. The last year closing rank in asked course at IIIT-D was 40562 for Delhi region candidates. While 6442 was for outside Delhi region candidates. So, you can get if belongs to Delhi region.

Expected Cut-Off up to 7 round is 3429
https://www.shiksha.com/university/iit-delhi-indian-institute-of-technology-iitd-53938/cutoff-jee-advanced
You can follow the link for more updates

Hi,
Follow this link to predict your rank:
https://www.shiksha.com/engineering/jee-main-rank-predictor

Just go through this link and fill out the required details:
https://www.shiksha.com/college-predictor

100 is sufficient to get IIT, but I am not sure that you will get a CS branch, you can get into BS in Physics or Maths or else ocean and naval architecture course, and it is also good.

Even if you have lost the chance to appear for JEE Mains in January, there is no need to worry since NTA will be conducting the exam again in April. There is no point in focusing on MCA after BTech from IIT. You should aim for MTech. However, if you want to do MCA then instead of BTech in IIT, you may do BCA after class 12th.

You must have science in your class 12th from any recognized board and must have secured 75% in the board exams.

For that, you need to clear Mains as well as Advance.