To create an account on Callbell Shop, all you have to do is visit the page www.callbell.shop/en and click on the "Create an account with Google" button.
Note: you need to have a Gmail account to register on Callbell Shop.
If you don't have a Gmail account, you can create it from here. You will be asked for your basic information in order to log into your account.
Once logged in through Gmail you will have the Callbell Shop dashboard available, from which you can start configuring your e-commerce for WhatsApp.