International postage costs by location

Hi Folks, 

 

I hope you are all well and selling well.

 

I need your help again with something that has my tiny mind bent every which way and please forgive me if I've asked something similar a long time ago. I'm just now getting a round tuit!

 

I'm not the shiniest penny, I know that, but how does anyone understand, upon eBay information, how to set up international postage rates by location?

 

As an example I'll use Etsy. All you need do there is input the postage $$$ you want to charge to certain destinations like say, the US, Canada, Europe, the UK, Japan, China, Singapore, anywhere else etc. Once you've done that postage is calculated at checkout based on the location of the buyer. But how in the good Lords name can I achieve the same here? I've tried. My endeavours don't work. I've really messed things up proper. 

 

I don't want to input postage costs for every country in the world, probably about 6 or 7 I'd say, being those that we post to often.

 

Am I missing something very simple, or is it as I suspect, convaluted beyond all reason? My reason anyway.

 

Any help appreciated, very much with this one.

 

Thanks.

 

Melina