How can I change the shipping cost from 'Free' to 'Calculated at next step' at checkout?

[AronTphotos]

Hi folks!

 So when I go to checkout, on the information "page" the shipping says "free" but when I add in the information, name, address etc and click on "Continue to shipping" the flat rate is calculated, how can I change the "Free" to "Calculated at next step"? I have just one shipping zone for all the world, flat rate. 

This is my friends store

This is my store before I put all the information about the buyer

Here's with the information

This is the shipping zone I have

[Horlart_Expert]

Hello.

Step 1: Choose Shipping.

Step 2: Edit shipping zone.

Step 3: Click Add rate.

Step 4: Select a carrier.

Step 5: Check mail classes.

Step 6: Include mail classes.

Step 7: Add a markup.

Step 8: Click Done.

If you need help, let me know

[Imogen]

Hi there, @AronTphotos. Thanks for taking the time to reach out to the folks here in the Shopify Community with your question about this wording in your checkout! It's good to meet you!

I just have a few questions for you before we dive in a bit deeper here:

• Can you provide me with a URL to your store so I can see this wording in real-time?
• Can you let me know what theme you're using in your store?

Please, follow up with me here whenever you have the chance! I'll keep my eyes peeled for your reply!