Changing to Monthly DD

Hi
I am currently on a prepayment meter with Ovo and would like to restart my account with Bulb, as well as go over to a monthly payment meter.
How do I go about this?

This and other information from the help button.
https://help.bulb.co.uk/hc/en-us/articles/115001227751-Can-I-switch-to-Bulb-with-a-prepayment-meter-