Build a website for selling pdfs without download

I'm seeking a freelancer to enhance this website, but first, I need advice on whether to continue with WordPress, like the current website with the needed modifications, or opt for a different technology starting from scratch. Older Website: [login to view URL] • Login Credentials: I will send by message • Developed with WordPress: Primarily utilized the "Out-of-the-box | Dropbox" plugin for WordPress and "Ultimate Membership Pro" - WordPress Membership Plugin Before initiating any work, the solution must validate that no one can download the documents in any way. Website Features Overview 1. Introduction Page: • Craft a dedicated page emphasizing the website's commitment to providing computer science exams with answer keys, focusing on supporting student success. • Implement robust SEO strategies, specifically targeting the keyword "devoir." 2. Free Exam Access: • Facilitate easy access to one or two complimentary exams with answers. • Prompt users to subscribe through a user-friendly form, presented in a pop-up or a blurred view of the exam content. 3. Subscription Form: • Include a comprehensive subscription form intelligently distinguishing between students and parents. • For students, request their contact number; for parents, request both email and contact number. 4. SMS Verification: • Implement a mobile SMS verification process post-subscription to authenticate the provided contact number. 5. Document Viewing: • Employ a solution (e.g., Dropbox) allowing document viewing only, restricting downloads while permitting scrolling through the content. • Users can view documents specific to their class, organized by quarter, with each quarter containing exams 1 and exams 2. 6. Paid Subscription Offer: • Encourage students, post free content exploration, to opt for a paid subscription, granting access to nine additional exams per quarter. • Present the subscription offer through a pop-up or explore other engaging alternatives. 7. Payment Prompt: • For access to additional content, prompt users to make a payment when clicking on documents displaying only the upper part of the first page. 8. Automated SMS Reminders: • Post free subscription, automate SMS reminders for payment renewal at specific intervals, with a maximum of three reminders per year. 9. Subscription Packages: • Present three subscription options: one quarter, two quarters, or three quarters. Consider offering a special discount for the annual subscription. 10. Secure Purchase: • Enable secure bank card or poste card transactions. • Automate account activation upon a successful purchase, accompanied by a confirmation mobile message. 11. Quarterly Follow-up: • For users opting for a single-quarter subscription, automate messages at the beginning and end of their subscribed quarter. 12. Mobile-Friendly Design: • Ensure the website is fully responsive for a seamless experience on mobile devices. 13. SEO-Optimized Titles: • Craft compelling titles for each exam page, enhancing search engine visibility. Additional Remarks: • Ensure a captivating and seamless document opening experience to maintain student engagement. • Consider incorporating additional content, such as special exams, available through independent purchases.