Setting shipping cost

New Member
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I have a problem with setting the shipping cost for my new Shopify store. I would like to ship to four different countries. 
I don't know what to set as the shipping cost for each country. I have read articles about Shopify shipping but I still don't get how to get the estimated shipping cost for each country. I have also downloaded a Shopify app "Estimated shipping cost" still not getting the result I want. At the moment it's only those in the USA that can check out of my store, those in other countries can't checkout basically because I have no shipping rate for those other countries.
NOTE; I'm on the basic plan.
Please any guidance will be appreciated.