CBSE 12th

You have some chances of getting this college. Try JEE college predictor to get more information and insight about college which you can get on the basis of your rank-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=4067795.

Bro, if you have a minute, please help in guiding me to get a better rank in UPES-EAT 2018.

At this score, I am sorry to inform you that cutoff for Welingkar is at least 97 percentile for PGDM and 98 percentile for MMS course. It will be tough to get but still you can try another year. Keep working hard to nail the required score. I am sure passion and Hard work will surely help you reach what you want.
Wish you all the best!

Just follow the link to predict the college which best suits you according to your rank-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7476690
Best of luck!

Hello,
You can pursue diploma after class 10th. 12th is not mandatory in order to pursue a Diploma.
Best of luck.

Hi,
Refer this link -
https://www.shiksha.com/b-tech/course/b-tech-in-aeronautical-engineering-agragami-group-vsm-institute-of-aerospace-engineering-and-technology-yelahanaka-bangalore-232754

No, bro. You can't NIT admission is based on JEE Mains. But, you can get other colleges on basis of 12th Marks. Use Shiksha's College Predictor for checking your chances, here for getting any College on basis of JEE Mains:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6540165.

You can apply for the university who takes their own exam for the admission.
Examples includes VITEEE, SRM, BITS, AMUEEE , KITEEE, WBJEE, etc.
Best of luck