Moving stuff around in TopDownTemplate like in Astroneer (Blueprint)

I am new in Blueprinting (And from Germany so please dont mind spelling or gramatical Errors).
I would like to recreate the way you can pick and move stuff around in Astroneer. but i have no clue at all how this could work.
basically what i have now is a playable Charrakter which you can move using WASD and not the Mouse method from the begining, so i can use the mouse for something else f. e. Picking stuff up. What i would like to do is make a cube hovering a bit in perspective to the Ground and follow the courser while clicked.

Thanks for helping me!