Law

Your marks is good enough to get this college. Good luck.

https://www.google.com/amp/s/www.shiksha.com/law/articles/amp/which-is-better-3-year-llb-or-5-year-llb-course-blogId-20027
Check out this article in Shiksha.

All Law Graduate Degree - LB / BL offering colleges should conduct Entrance Exams / Take score of Common Entrance Exams in Law conducted by respective State/ Central Governments.

Hi Anshika, yes, of course, Kurukshetra University is good for legal studies. The college is having a very good infrastructure and good team of experienced faculty members. It will definitely help you to excel in your academics. You can go for this college. Best of luck.

Here is the link for the detailed procedure of the admission process:
https://www.shiksha.com/university/sgt-university-Gurgaon-38726/admission

After class 12th, you have to give CLAT exam for taking admission in a good Law College. However, there are many other colleges which take admission without CLAT exam. You have to prepare general awareness questions and basic legal questions from constitution and Criminal laws.

LLB Through correspondence is of no value. Better, if you don't regular degree law course.

Yes, to give judiciary exams, you have to have a law degree. It is not at all necessary to become a judge. You can practice law and even become a corporate lawyer.

Yes, it is a good option. Finally, it depends upon your caliber and interest.

It depends on your interest. If you want to go in for practice then you can do private practice, or you can chose to be corporate lawyer or you can join a penal of legal advisor in some company, or go for judicial services. The career and scope is endless.
All the best.
Do your best.