Trying to create a top-down camera mouse drag

Hey all, so as the title says, I’m trying to recreate a camera like the one you can find in Google Maps.

I already have a pawn with an spring arm pointing down and a camera attached to it, now I need it moving on left-mouse button hold. To explain myself better, just open Google Maps and move the camera (not the zoom). That’s it.

How can I recreate that on UE4? I’ve tried multiple times but I’m not getting any result. Any help would be very much appreciated.

My current messy blueprint looks like this, but it totally doesn’t work. And I don’t know how to proceed, not even a tutorial or another forum with something similar.