Prerequisites in a Title

Hi everyone, I am wondering if anyone has come across this.

I have created a title with 6 lessons (buttons). Each lesson has anywhere from 5 10 pages. Because the lessons are not being created separately, but as one huge title, i am having some difficulty setting prerequisites.

Any ideas as to how i can set prerequisites for the way this is set up?

So basically I would like the user to complete all the pages in the Welcome lesson before the Introduction lesson becomes active. The users navigate the lessons using the Next button. Additionally, I dont want the user to be able to select the page in the table of contents unless they have already visited it.

See image attached

Thanks

Andrea

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