I would recommend a single action revolver like Ruger single 6. Keeps good safe conditions while working on fundamentals. Would eventually transition to double action revolver.
Too many safety issues with a semi-auto and most sights are not great. Nothing against a nice semi IF you are willing to provide the close supervision. I am a fan of one shot at a time until the skill level comes up. I used to limit my son to a single shot shotgun when we started out. He would mostly keep the barrel in the right direction but excitement and youth make mistakes. Figured I was much less likely to get shot by a second round in the chamber.
