I'd also go with a 10/22 for a semi auto gun thats super affordable. If you are truing to get family members comfortable with guns one of the S&W 15-33 sports could be good just because it's just like an AR. But many have made good cases for bolt guns and it's also a fantastic option! I like the CZ rifles mentioned and if you are on a budget the Savage rifles are still very good and a touch cheaper than the CZ options. I personally started on a Marlin lever action but I was also very fortunate.