How can we go in the field of research and training in astrophysics?

Dear student,
You can pursue integrated courses in Astrophysics from Indian Institute of Astrophysics or from Indian Institute of Sciences.
They have Integrated Ph.D courses as well as masters courses as well.
Also, Delhi University Department of Physics and Astrophysics has a good number of faculties who can get you good guidance in pursuing courses in Astrophysics.
I would like to suggest you that you take one step at a time, first enroll in a Bachelors Course in Sciences and then look forward. You may also get good opportunities abroad viz USA.
Regards
Sumit