Step 1 : Using your genuine flipkart account, order regularly like once a month for 3-4 months until you get the option to activate paylater.
Step 2 : Activate Paylater and make purchases on Flipkart using paylater for 3-4 months. It will build your Experian while Cibil takes time.
Step 3 : Download Onescore and apply for Onecard [on the basis of your Experian report], you will be approved.
No credit history
No income docs