There are no shortcuts in this profession. Only the performance and number of years dedicated to the company can take you at this position and based on your performance you can be promoted to Manager in 2-3 years.
Bank PO or Bank Probationary Officer is a starting level appointment of bank officers. The person who selected will be on a probation period of 2 years. To be eligible for this post you should be Graduate from any stream and between 21 - 30 years old