Hey Manisha, the field you are willing to opt for your future is a really interesting field with a lot of scopes.

You can do B.Sc in psychology from some really good college, for example, Lady Shree Ram college, Jesus & Mary's college and a few others.

Check the link below for knowing more about some good colleges:

https://collegedunia.com/courses/bachelor-of-science-bsc-psychology-colleges-in-india

You can then prepare for RAT (Written Eligibility Test) at any college of your choice from which you are willing to do M.Sc. The university will invite you for the test if you are found eligible.

The eligibility criteria for the RAT are:

1. You must have completed your B.Sc or B.A. in Psychology with a minimum of 50% aggregate marks.

2. The students who have cleared JRF, GATE and other relevant exams can also be invited for RAT by the universities.

Hope this helps.

For more detail about the course please refer to the link below:

https://www.careers360.com/psychology-course

Good luck for the future.