IIT

Now, your JEE score will reflect more for admission in any college instead of your class 12th percentage. But you can go for aerospace engineering, there might be some chances.

By giving NDA, you are qualified for IMA, INA and Indian Academy of Air Force. After passing from NDA, you get direct Lieutenant rank or Captain rank in the given regiment. By giving IIT JEE Mains or advanced, you get to become a reputed engineer. Choice is yours. I'll go for NDA as a soldier lives

No, I don't think it is possible anyway to get into IITs without scoring good marks in GATE. If you really score good marks and your rank is quite good then you can expect decent and lucrative jobs in any of the PSUs. But, you will have to score literally good.

You must have rank under 100-150 in your category(ST). Score stats are different every year since the paper pattern is not fixed. But you should have scored atleast 45-50% marks for that.

Hi,
Please refer to the links below:
https://www.shiksha.com/b-tech/jee-main-exam-cutoff
https://www.shiksha.com/b-tech/articles/how-to-calculate-jee-main-rank-from-percentile-blogId-19953

Final rank AIR will be declared after JEE exam in April before that any predictions will not make sense-
https://www.shiksha.com/b-tech/articles/how-to-calculate-jee-main-rank-from-percentile-blogId-19953.

Please click the link below for details. You can also refer to your seniors or college teacher for detailed information. https://www.shiksha.com/engineering/gate-exam.

Absolutely yes, you'll have reserved seats in ST category. All the best.

Yes, she can got a NIT (Kurukshetra or Barangal or Jamshedpur or Meghalaya or Sikkim or Goa) through girls reserved quota.