Hello sweta!!

You need to put timetable based on your free time try to spend atleat 2 hours per day. The time may be based on your schedule. But don't get distracted during that two hours be dedicated to your work. Buy previous year questio  papers and see how the question paper is designed and try to solve one question paper per day when ever you are free. You can definitely clear bpsc exam. It will tough in the beginning days trust me if you follow these steps you can definitely clear the exam.

Thanks a lot!!!