Design a website for an online library

It is an online library with books for children's education. Just like this one -> [login to view URL] <- ... It needs a homepage with: sliders to put content related to the website, 3 icons that link to the content (books, videos and audiobooks); a section with some thumbnails of the covers of some of the content, rotating between "most seen", "most recent", and some other categories. It is a subscription page, so it must have a subscription base model with connection to some payment systems. It needs an item list page, with a list of the content, separated by some specific categories. And an individual item page that has a description of the content in the item. It needs a pdf reader for the books, preferably a flipbook reader. And also a video reader for some videos and an audio reader for some audiobooks. Some sort of voucher creation system is needed to enable free access for marketing reasons. There will be a constant adding of content, so, some sort of backoffice system to insert content is needed. Also, clients/subscriptions have to be managed in that backoffice. It needs a specific electronic book, like a teachers book for appointments, class summarys, meetings, calendar, etc.... this book has to be able to include links to specific content that is already in the website. i.e.: by clicking on a link in a book that is on the website, we can add it to a class summary on this "electronic teacher book".