Hello Shreyasling,

To continue your higher studies with astrophysics you can find many ways one of which I am staying here:

1. Continue 11th and 12th with PCM. Keep working hard and focus on maths and physics 

2.. You can then do B.tech/B.E in electrical or electronic.but most of the universities offered various courses related to astronomy at masters and P.HD level. These university are IIsc Bangalore , Delhi university, jadavpur university offered course at masters level.

OR

You can take a graduation in physics and masters with the respective discipline. 

The major institutes for astrophysics are:

• Indian Institute of Technology (IIT) Bombay. IIT Bombay's Department of Physics is one of the best in India. 
• Indian Institute of Science (IISc) – Bangalore. 
• IIT Madras. 
• IIT Delhi. 
• IIT Kanpur. 
• Tata Institute of Fundamental Research (TIFR) Mumbai.
• Delhi University. 
• IIT Kharagpur.

Have a bright future.

Hi

After 10 std you will have to take science stream. In 11 and 12 std you will study basics of physics, chemistry and maths which will help you in future carrer. After 12 std you have have to go into Pure science branch. You will have to take up Bachelor in Science in Physics, in this you will study classical mechanics, quantum mechanics, thermodynamics etc. Now after B. Sc in physics to make carrer in Astrophysics you will have to do M. Sc in Astrophysics. Many Universities in Inida offer this course.