Word Templates Ecommerce Website

I need a clean, conversion-focused website where visitors can browse, pay for, and instantly download my Microsoft Word templates. Once a customer completes checkout, the system must generate a secure, expiring direct download link so the file is delivered immediately—no manual emailing on my side... (Budget: $750 - $1500 AUD, Jobs: Content Management System (CMS), Payment Gateway Integration, Quality and Reliability Testing, Web Development, Website Design, Website Optimization)