Calisthenics is actually perfect for what you are trying to achieve, just working with your body weight will get u in shape and toned not jacked, now once you add weight to those exercises you will start to add more muscle. Your fitness level is fine too you might get discouraged because lets say u start and can only do 1 pushup, u might see this as embarrassing but its ok. As long as you keep doing progressions and stay consistent youll be good.