Jeannine........
Calculated shipping is pretty easy to set up. Have you read any of the wonderful "Help" articles that Etsy has written?
This article explains in detail how to set up calculated shipping. First you need to set up a calculated shipping profile, and this article explains how to do that:
https://www.etsy.com/help/article/6131?ref=help_search_resultAs for your question: "I see in other stores how the buyer just clicks on the country, or a zip code and gets a shipping cost. Is that SP or CS?" That would be CS.
I know CS can be a bit confusing, but if you follow the above help article that I have posted, you should be able to set up a calculated shipping profile within minutes.
Best of luck to you! Ginger