So this was an idea I had to exploit my current UE4 learning - A cooperative 3rd person dungeon crawler. One of the main challenges is assets for a game like this although there are many free assets on the Epic Marketplace. The other technical challenge is testing multiplayer setups especially if mobile platforms are going to be supported.
When testing for mobile, if you have access to a tablet as well, you could use that too as a second device.
Great idea and thanks for sharing. I hope you enjoy the course.