What should I do to start a career in banking sector?

Hmm.. There r two possible ways for it.. Frst is by doing coaching and scnd is by doing self study to prepare for bank exams.. Bank exams are more about time management than knowledge.. So u should more nmbr of mock tests n gain confidence from it.. Best of luck.

first prepare yourself in all categories which banking sector want to need. if you prepare yourself in all subject you will got success in banking exam.

you can do banking course from IIBF ie Indian institute of banking and finance, flagship course or GNIIT (banking and finance) from NIIT along with graduation to get job in private banks. you can also attempt IBPS exam after completing your graduation to get job in government banks.

You should probably start preparing for the entrance tests in case you want to land up with a PSU bank. For private banks, you should decide which domain you want to work in and then prepare accordingly