IMO Steel Challenge is the perfect way to start. You can shoot almost any gun including 22lr rifles and handguns. Several clubs in Indiana hold Steel Challenge matches. You don't have to buy a ton of equipment to compete. No shooting on the move. There is movement in 2 stages but you shoot...
The picture is blurry but check the headstamps. Are they all the same? If they are different that would tell you someone used the box to put their reloads in.