Hello 
I am very new to UE and have just made my first little game. I created a simple UI start screen with just a „start“ button that opens up the first level. I would love to play using my controller but i have to use the mouse to click on start. Is there a beginner friendly way to have a controller button act as left click? Thanks in advance!
Try this in the widget:
May be enough, do tell if it’s not.