If you are running an eCommerce business, using Shopify, you & your Marketing Team, should be able to make quick changes to your website, without needing help of a developer. That’s the whole point of using Shopify.
🚫 I will strongly recommend NOT using a ⛔Custom Theme⛔, unless you have a very specific & valid reason for doing that, being dependent on your developer.
You can go for any good Shopify theme compatible with Online Store 2.0 / Horizon Frameworkwhere you can easily edit templates using Sections & Blocks. Equally easy should be adding App Blocks for added functionalities.

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💡 Remember, for most eCommerce Shopify stores, there is nothing to design or develop. If you are using the right theme, it’s just about choosing the right sections & blocks.
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as it’s easy to use & can save money replacing a lot of apps.

Debutify: Your Partner in Starting and Growing Your Brand Effortlessly
Public list of Shopify stores using Debutify. You can see a lot of larger stores are using them.
Debutify team takes customer feedback seriously, not just to fix issues but also to launch new features.
Debutify: Your Partner in Starting and Growing Your Brand Effortlessly
<aside> 💡 The theme in itself is FREE. So we can test it with your existing Apps without buying anything. Different plans are for the add-ons.
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You can check the add-ons working on our demos below:
Debutify Theme Features | Add-Ons