7.5 inch long barrel is very, very short. I have no idea why it would be considered a rifle instead of a pistol.
It would not be a good learning rifle at all, because learning to shoot a rifle means aiming down a long barrel. Indiana makes sawed off shotguns legal - but we hear "short rifle" (sawed off?) in this case.
Just for comparison, my dad's Colt 45 (revolver, handgun) has a barrel with 10.5 inches. It would not be at all good practice for using a long gun, IMO. 7.5 inches is the size of your typical concealed weapon (handgun) and no way that shooting with it would provide instruction on long gun use.
IMO, that's not a rifle at all.