Customizable Shopify Theme Development

I need my existing Shopify theme made customizable. I don’t believe it’s a lot of work as the website is already fully built I’d just like a few changes made to the sections

Requirements:
- Customizable Header and Footer:
- Logo and Branding
- Navigation Menu
- Links inside the header that can be renamed, added, or removed

- Customizable Product Pages:
- Product Variants
- Image Gallery
- Customer Reviews

- Customizable Homepage Layout

Ideal Skills and Experience:
- Proficiency in Shopify theme development
- Experience with customizing headers, footers, and product pages
- Strong understanding of Shopify's Liquid templating language
- Familiarity with responsive design principles