Need help in setting up a Shopify Store that will sell Excel Spreadsheets I've created that create comprehensive databases of information.

I'm looking to set up a Shopify Store that will offer comprehensive databases in Excel Spreadsheet format. Specifically, I want to create product listings on the store, enable customers to add products to their shopping cart, and have payment processing available. These basic features would suffice. The timeframe I'm aiming to have this project finished within a week, but I'm open to hearing what timeline would work best for you.