Hi Tom,
I'm sorry you've been having such a hard time creating a new discussion! That sounds frustrating. If that issue continues, I would suggest logging a case with our Support Team:
https://articulate.com/support/contact/caseThe only way I know to create quizzes in PowerPoint is by using Articulate Quizmaker. If you'd like, you can try it for free by starting a free trial of Articulate 360: articulate.com/360/trial
I understand that subscribing to our software would be an added cost for you, but it would likely save you a lot of time!
In the meantime, if there's anything else I can do to help, please let me know!