Hi there
I have checked your screenshots can build a landing page with checkout according to your requirements.
I am a senior developer and designer having experience in web development and Web Designing using Java, PHP, WordPress, Shopify, WooCommerce, BootStrap, Python, React, JavaScript, Node JS, UX/UI, CSS, HTML, API’s and many more.
Kindly tell me which payment gateway do you want to integrate?
Thanks