Pointers on basic grid based movement

I’m new to UE4, and trying to make a very simple TBS game. Can anyone point me in the right direction towards making a grid based movement system? I’m aware that I need to create some kind of mesh that indicates where a pawn can move, but I don’t know how to do this. Once I get past this hurtle figuring out navmesh for where a pawn can and cannot move should be much easier. For this I’ll be likely using the top down premade assets and deleting a lot of whats there till I just have a spectator camera. It’s strange because it seems like a simple system, yet I don’t know what to do as opposed to FPS or TPS. The type of grid movement would be in the vein of strategy games like XCOM.