Subscription Order confusion

I just changed my Subscription for shipment date of tomorrow April 6, 2019. Will the system automatically pull funds and place the order for me or do I need to do anything more?
Re-ordering is a little confusing. Do you change your subscription in the Subscription and Orders section or do you start fresh from the Cart? Thank you:)

Hi there! The system will automatically pull funds from the card attached on the charge date selected. So once you make account preferences, everything is good to go! Easy peazy. Let me know if you have anymore questions.