To set up an E-NACH, start by initiating the request through the InstaMoney app. Select the "E-NACH" option, and you will be redirected to your bank’s website, where the E-NACH setup page will appear. Review the details and choose to complete the setup via debit card or internet banking. After entering the required information and submitting the request, the E-NACH setup will be successfully completed.
Here is a short video for your reference to guide you through the process