Single Product Checkout Page Creation

I need a simple, user-friendly cart page for a single product.

Requirements:
- A "Buy" button that adds the product to a cart first.
- A contact page with fields for name, email address, phone number, and message.
- A clear "No Refunds" message displayed on the product page, cart, and checkout pages.
Delete at the top right one of the empty pages double icon for Home and Refund and returns policy
ex: Home Cart Home Refund and Returns Policy

Ideal skills and experience:
- Experience in creating e-commerce pages
- Familiarity with secure payment integrations
- Attention to detail and ensuring a seamless user experience