You can make career in lectureship and professorship program through CSIR/UGC NET exam.You can go for B.Sc program after completing the 12th.
You can complete the post graduation (M.Sc) and apply for the exam.
The age limit for JRF is 30 years for General candidates whereas for Reserved categories is 35 years maximum
This is very good program that provides money to do research and make self-career by doing studies.
If you are doing PhD that means you are getting UGC Scholarships of INR 25000 per month for 5 years and that is the good amount