New to unreal, looking for advice


Im developing a 2d game in unreal and have set up a tile map for it. I want to place on this map an image that I can click, and it will change to a different image. I need help with a general approach to this, should I be using a mesh, or brush, or actor, or is there some way to apply an image to one of these? Im having a hard time placing a mesh and using the built in on click for it to do something. Help is much appreciated