The Church of England has a good resource called “Your Church Christening” . It has answers to even more questions than we could think up so we encourage you to visit it.
Your Church Christening allows you to explore all the possibilities around baptising a child in your care, including different options for the service and arranging Godparents, sponsors and other matters. Please do have a read. While there will be some minor variations to accommodate our local situation the Your Church Christening website will get you thinking.