How to make a drag and drop menu in 2d for a 3d game (sims 4 furniture like)

Hi!! Im trying to do a 2d drag and drop menu to place furniture in a 3d game. Im a begginer so i dont really know a lot about script. I would like to make a 2d menu where there are flat images of the furniture and when you drag it to the space they turn into the 3d models. Just like in the sims. I alredy have a script to make de objects move on the space (a room), it is a character controller instead of a object controller because my teacher told it would be easier. But now i need to make the menu so the game works. Any help would be amazing!! thank u!!