How to setup an online design store

Hi Guys,

I would like to create an online design store to sell some of my designs both locally and internationally.

I dont have any experience in setting up an online store, so I was hoping someone who has gone through this process can suggest any good companies or service providers that provide a good back-end system that will allow me to customize the look and feel of the store through logos, backgrounds etc but which will take care of all of the complex coding, billing etc