How do I convert my minor bank account (HDFC) to a separate bank account when I turned 18

My HDFC bank account is connected with my mom's account. I have recently turned 18, how do I convert my minor savings account into my own account? I have applied and received my Pan card. Can I do this process online or do I have to visit my bank branch? How many days will it take approximately? Will I get new atm cards once the conversion is done?