Hello! I have experience developing websites in HTML, CSS, JS, PHP and SQl. I specialize in modern frameworks like Angular, which offer more scalable, feature-rich designs. I assume you already have a server and database for the site.
For the user profile, I envision an Instagram-like interface:
Photos uploaded by the user.
Public bookmarks section.
Profile picture, name, and bio.
Features: User registration, login, logout, and an admin dashboard showing: total users, posts, top users by likes/bookmarks, and most bookmarked photos.
While your current site uses HTML/PHP, I recommend Angular for scalability, modern UI/UX, and faster development (13-18 days vs. 30-40 with HTML/PHP) and if you have ready the queries I can help you with the API development to to make you idea ready not only for the web but the mobile devices world too in the future. Let me know your thoughts!