Beginner: How do I implement viusal coordinates on screen based on an origin point on the terrain

I am a complete begginner to both unreal engine and c++. I have done a bit of c# but struggle on my own. I can’t go to school and even so, it is my desire to become an autodidact! I just need something to help get me started…like really! Where to begin? My GOAL is to have on screen coordinates displayed while playing the game that is based on the origin point of the terrain. Halp me! Please.