International Shipping rates

I am very new to Zen Cart and we offer free shipping to the USA on our website. I need to know how to set up shipping rates for international customers, as we only want to offer free shipping to US customers. I have no clue how to do this, other than defining the free shipping to the predefined zone of the US. I am completely lost and in desperate need of expert guidance. Is there any way someone could give me an idiot proof breakdown of the steps needed to set these parameters? I will definitely buy coffee for anyone amazing enough to help me solve my problem. A little background information: Until a month ago, I never knew anything about website design or php, html, or coding. I am learning everything I can, but my other work responsibilities prohibit me from delving into this as deeply as I would like. Please help! :blink: