Career

If you want to pursue further studies, you can go for PhD.
If not, you can go in teaching line always. You can apply for an assistant professor in college or lecture in school by clearing entrance exams. You can also try for coaching institutes.
If you interested in civil services you can go for that

You can go for Dinesh's or Pradeep's books. They are having very good content and a lot of questions.

Yes, there are many other exams for law but all those depends on the colleges or universities where you want to take an admission. In which city/state or university you want to pursue? First, confirm this then after that, I can help you out further.

If you're interested in IT and software then you can choose engineering. You can give JEE Mains exam and according to your rank, you can get the best college.

You can take up B.Com or B.Sc. It totally depends on your interest. After your graduation, you can apply for IBPS exam. Hope my answer helps you in future.

It's not necessary to opt Java for banking.

If maths is your favorite then after 12th, you might opt for one of the two options either you can do graduation in maths or choose to be an engineer with mathematical and instrumentation as your trade.

Nowadays, many new courses are emerging up and each of them has their own values. But as far as I know, Java is the course which in spite being so old, it's value is very much high. Even Google's CEO after graduating from IIT in metallurgy engineering did Java and now he is the CEO. So, as far as I