Ensuring success is best accomplished by two avenues of approach!
First off, the 38 wadcutter ammo but factory is spendy as it comes in match designation IE Federal GM Match. If you reload then the gold standard is 3gr of BE in 38 spec case with 148gr WC seated flush to the case mouth. But, it might worth it, if a 22 LR gun is not available to help with fundamentals of gun handling!
Next, avenue is professional training done by another female or male with a track record with teaching females! More significant others turn off their partners with a know it all attitude! Seen that happen more then once! If you make this happen well, it will almost be like a "SPA" day for her!