Newbie question on creating quiz that records answers and calculates score

When I say I'm a newbie to PowerApps, I really mean newbie. Until last week I'd never heard of it, used it or understood anything about it. The only reason I'm now trying to use it is that I wanted to create some training aids for work and thought that having an assessment based on a quiz would be a good way of measuring staff members knowledge and identifying any common areas for future training and development. When I googled how to do that, I found a couple of tutorials on PowerApps and storing the results in Sharepoint which I really liked the idea of.

That aside, so far I've managed to create the tutorial sections and want to start adding in the quiz assessment in the form of multiple choice questions using radio buttons. The problem is that I found online tutorials which showed how to add questions from a Sharepoint list where option A was always the correct answer and it would randomise the order they were displayed. Doing this you could then calculate how many questions the user got correct as a percentage. What it didn't do though was record the answers to each question in a Sharepoint list so that you could then analyse what the user got wrong. I then found tutorials on how to create a quiz that recorded the answers in a Sharepoint list but what it didn't do was work out the pass mark.

Does anyone know of a guide for newbies or can explain how to go about creating a quiz that records the answers for each question but then also works out the users score as a percentage with a pass being 75% correct or higher?