Shopify Website Design for Children's Product

I need a Shopify website designed to sell physical products. Initially, I will be listing between 1 to 20 products. I already have a Squarespace website (self-made) where information can be transferred from.

Key requirements:
- Aesthetic and user-friendly design (large images, dynamic with some movement throughout, bold colours, seamless positioning).
- Secure payment gateway integration (incl. Afterpay, PayPal, etc).
- Mobile-responsive layout
- Basic SEO setup
- Product listing (1-20 items)

Ideal skills and experience:
- Proven Shopify development expertise, particularly for children's brands.
- Strong design skills
- SEO knowledge
- Experience with payment gateway integration

Additional features:
- Customer reviews on main page.
- AusPost integration
- Children's product with target audience of Australian Mums - we want a style that reflects this. Clean, bold, fun, matching our brand aesthetic.
- Transfer existing mailing list from Squarespace to Shopify.

Additional details:
- Access to our current Squarespace website, logo, and brand colors will be provided for consistency.
- Font preference is flexible but should maintain a clean and modern feel.
- Homepage should include product photos, heading banners for promotions or sales, customer reviews, and easy navigation.
- Sales will be within Australia, with the potential for international sales in the future.

Current Squarespace website:
https://toddleandtum.com

Some websites that are for our target market to give an idea of style:
https://www.mrsippy.com/
https://www.halcyonnights.com.au/
https://shopplaylinen.com/