Online Certification Exam App Development

I'm looking for an experienced developer to create an online exam application specifically for professional certification exams. The app should be built using React, Next.js, and Express.js, with a MySQL database.
80% requirement below, 20% may vary. keep in mind, while budgeting.

Please BID going over the below requirements and provide the cost, which should not be changed more than 10% at any point of time. If you will change the price, after bidding, please refrain from bidding so that both can leverage our time productively. Bid with how many UIs and DB tables, you would expect for this design.

Milestone: Landing Page with Dynamic CMS Integration & Dynamic Blog

• Dynamic CMS site hosted with about, product, services, certifications, Resources and footer etc.
• Admin can manage all content via CMS (no dev involvement)
• Blog system: create blog, upload image, publish dynamically
• Dynamic landing page having around 7 to 8 sections including footer - bidder need to share mock design before starting the project, with DB and complete table structures with Referential Integrity(RI) & Index

Acceptance:
• CMS demo (create/edit/update/delete pages)
• Blog creation demo
• Dynamic Landing Page, Entity Relationship Diagram with RI tables and Objected Oriented, Reusable, clean code following the best practices and standards
• Testing screenshots