How to change Shopify URL more than once

[Amalat]

I'm new to Shopify, still on the 3 day trial. I've tried completing the tutorial except one box won't check, that's the custom URL. I'm assuming that is changing the default random string of letters into an actual myshopify URL, which I had done first, now it will not check off. I've done everything in my power to make it check but nothing will work. I'm not too keen on pushing out 15$ just to complete a stupid tutorial. Any ideas how to fix this?

[Erin]

Hi, @Amalat. The tutorial you're mentioning are just suggestions to help you get started. This isn't required to be completed. The custom URL suggestion is not suggesting you change your .myshopify.com URL. It's suggesting that you add a custom domain to your shop to establish your brand and build trust in your online store. You can learn more about adding a custom domain to your shop here.