Creating 3D quiz game with enemies

I am new to Unreal engine and I must say that so far I like it very much. I want to create a first person shooter where are rooms with enemies. To get through doors (in each room), player needs to kill all enemies and answer a quiz question. When he answers correctly, the doors open, and when he answers wrong, he gets to the beginning of the game. The questions should be just some text and the player should be able to select the correct answer with specific keyboard key or maybe with left mouse button… It will be also nice if the questions appear randomly every time…
So my question is: how to make those quiz text questions at every door? I am no coder. Thanks!

Please help someone…

HELLO my project same Idea but Iam dont work