My name is Erin and I am a Guru here at Shopify. Thanks for reaching out!
When setting up Shipping in your admin, you can choose between creating your shipping rates based on product weight or product price. If you choose to set up your shipping strategy based on weight it is important that you associate weights with your products.
I have gone ahead and included a great video which will walk you through creating your shipping zones and rates [here] (https://www.youtube.com/watch?v=Vk4XzoXdHK8).
Please do not hesitate to contact us if you have any questions :)
Have a great day!