Going to be bringing a buddy with a hand disability to the range. I plan on letting him kind of find his comfort zone with some minimal direction, but should I try to encourage him to use a two-handed grip if possible, or just go straight to one-handed? We will be shooting handguns, nothing crazy just some 9MM. Anyone have any experience first-handed or otherwise? I don't want him to feel frustrated, but I'm having some difficulty finding some good resources on shooting with only one-hand or a partially working support hand.