Audrie Gordon from the PowerApps team does a full walk through of all the create and update formulas related to the Project Online connector as a back-up to the webinar earlier this week:
https://powerusers.microsoft.com/t5/Live-Events-and-Webinars/The-Power-of-Office-Graph-with-PowerApps/m-p/116888
Note: "Create Resource" is not covered, and the List Projects and List Tasks formulas were already clearly covered in the webinar. See link below to access the sample app and formula notes.