When you are ready to check out of the store, if you are not already logged in you will be asked to either register as customer or login. Once you are both registered and logged in, you will be asked to provide the shipping address for your order as well as to choose a shipping method (if there's actually more than one choice for the shipping destination you're provided). After this you will be redirected to PayPal for payment. Once payment is complete, you will be able to check the status of your order through the "My Account" tab.

If you are having any trouble checking out of the store, please let me know what the trouble is and I will look into it.