Landing page for an e-commerce app

We need help with designing a landing page for a Shopify app.

Text content will be provided, but we don't have any images besides the logo. So, you will need to either create relevant graphics yourself or collaborate with somebody.

We are looking for somebody who can guide us through the design process, not merely ask us what we want.

Some of the landing pages that I like:

1. https://www.growave.io/
2. https://vitals.co
3. https://judge.me
4. https://loox.app/

Please send a few relevant examples of your work.

Please suggest approximate budget (we can negotiate later)