A pair of snap caps from A-Zoom is a good idea for loading/unloading/dry firing drills. That's about as low recoil as it gets 8^). I like to 'rest springs' on a double gun that is put away in storage between uses, and prefer to use snap caps to drop the hammers on when putting the gun into the safe for a while.
Next step up is primer only loads. You can make those by removing the components from a loaded shell, since you don't reload. Just cut away the hull below the base of the overpowder wad and discard all but the base of the shell and the live primer. That's like firing a capgun but it is the next step up.
There are several other improvisations you can conduct up the scale to regular factory loaded ammunition. Some folks have been known to open the crimp on a shell, remove the lead shot, replace it with popcorn and recrimp it for instance- not that _I_ know anyone who would do such a thing of course. The light loads are a great idea, and the Stoeger has enough heft to make it a good platform for a beginner to learn on. Hope the instruction goes well,
lpl/nc