User Interface
Open up the Content drawer, create a new widget blueprint and name it "WBP_HUD".
info
If you have an existing HUD display in your project, you should use that one instead of creating a new one. Having multiple widgets on screen can reduce performance.
Place the WBP_QuestJournal inside the HUD and anchor it to any position you want.
Inside your player controller, on begin play, create the HUD and add it to the viewport.