Writing an IDE for elearning software

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C#

WPF

I'm trying to write an IDE for developing interactive ebooks. The person using this would have controls like media player, puzzles and stuff to develop their ebook and export it to a format that I made myself. I'm thinking of sth like visual studio where the user can drag controls on the page and preview the book in live view. I also want to go for the office ribbon style and I'm going to use wpf for writing my controls and everything.
I don't know where to start are there any principles or anything that I have to follow for writing IDEs?
Any suggestions are welcome.

PS: This is going to be my undergraduate final project so I want it to be as good as it can get.