Hover event with VIVE Controller

Hi all, I am quite new to Unreal. I made a scene for VR using the standard template.
I use the Vive controllers and navigation/teleporting works well.

Some questions: I need a textrender to appear when hovering with the laserpointer of the controller over an actor.
I have tried everything, but can;t get it working…
I searched all the forums on internet, but no luck for me.

How can I best made this event? I don’t know which event I have to use. Also tried with actoroverlap, but didn’t know which actor I have to use (Grabsphere in the controller BP?)

Other question: when playing in VR I can select all actors and get then a gizmo. Can that be disabled?

Thanks in advance!