You can indeed create an online store that can showcase one product with the variants on the homepage. In order to do this, you will need to remove all sections on the current theme to add oneFeatured productto have it listed. I took a screenshot of my test store to provide an example:
However, we cannot allow the customer to complete the checkout directly from the homepage of the online store. They will need to be directed to our secured checkout in order to complete the purchase of their order.
With that being said, I would suggest reaching out to aShopify Expertif you are interested in hiring an individual to build the online store on your behalf.
Let me know if you have any questions.
Ollie | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog