There are multiple ways to create an order.
Pressing the "New Job/Order" button at the top of the user interface - Red
Pressing the "Create Job/Order" button on the job/order list - Orange
Pressing the "New Job/Order" button within the customer profile - Green
When using options 1 and 2, you will be required to select an existing customer or create a new customer for the appropriate job/order.
Once inside the order you can begin managing the order, scheduling events, adding cart items, accept payments and then you can close the order.