I’m surprised no one has mentioned tabletop simulator on Steam. Lots of free mods that let you do all sorts of things. And it’s system agnostic because it’s essentially a physics simulator, with some game hooks like dice rolling and card drawing.

Plus, if you want to get fancy, it does things like image import and fog of war, And it’s got the voice chat and text chat built in.

If you do use it, don’t forget to go to the settings and prevent other players from flipping the table.

Your power supply has ratings for the different rails. Can the 12V rail handle everything you have on it? Might be time to make a spreadsheet of the known power draws on each rail.