Shipping Extensions

I'm new to ecommerce sites here at Squarespace.

I enabled EasyShip, but Squarespace still needs me to 

1. set up shipping zones

2. pick a carrier

3. set pricing based on size and weight

Where/how does EasyShip come into play? 

Are the other extension services easier to integrate?

Thank you,

AOS

I have this question too. I have connected Easyship but not available during checkout.

In Easyship control panel, check is not available. In Squarespace, when I try to add shipping option , there are only limited options and Easyship is not shown. Easyship for my Shopify store is working fine but just not Squarespace.

Thank you