How to find the first child serializedProperty inside a PropertyDrawer

I would like to find the first child property inside a a PropertyDrawer. In my current code I get value of the first enum to use as a label, but I need explicitly find the child property by name

 how to find first property in a property drawer
 
 [CustomPropertyDrawer (typeof (TempleIdleGenerator.RaceSlotItemFreq))]
 public class RaceEnum : PropertyDrawer {
     public override float GetPropertyHeight(SerializedProperty property, GUIContent label) {
         // use the default property height, which takes into account the expanded state
         return EditorGUI.GetPropertyHeight(property);
     }
 
     public override void OnGUI (Rect position, SerializedProperty property, GUIContent label) {
         EditorGUI.BeginProperty (position, label, property);
 
         // Draw label
         var labelProperty = property.FindPropertyRelative ("race");
         int index = labelProperty.enumValueIndex;
         label.text = labelProperty.enumDisplayNames [index];
         EditorGUI.PropertyField(position, property, label, true);
         EditorGUI.EndProperty ();
     }
 }
 
 [System.Serializable]
 public class RaceSlotItemFreq{
     public Race race;
     public List<SlotItemFreq> slotItemFreq;
 
 }
 

I would like to replace the phrase property.FindPropertyRelative ("race") with something that finds the first child.

Final code here

 [CustomPropertyDrawer (typeof (TempleIdleGenerator.RaceSlotItemFreq))]
 public class LabelEnum : PropertyDrawer {
     public override float GetPropertyHeight(SerializedProperty property, GUIContent label) {
         // use the default property height, which takes into account the expanded state
         return EditorGUI.GetPropertyHeight(property);
     }
 
     public override void OnGUI (Rect position, SerializedProperty property, GUIContent label) {
         EditorGUI.BeginProperty (position, label, property);
 
         // Draw label
 
         var tempProp = property.Copy();
         property.NextVisible (true);
         int index = property.enumValueIndex;
         label.text = property.enumDisplayNames [index];
         property = tempProp;
 
         EditorGUI.PropertyField(position, property, label, true);
         EditorGUI.EndProperty ();
     }
 }
 

Cheers, Grant