Riley has now just gotten the hang on self feeding with the spoon and he is 17 months. At that age, I would give him a spoon to hold while I was spoon feeding him so he could try to do it himslef if he wanted.
He took to fingerfoods well, do you have any ideas why she doen't like to hold the food? Could it be a texture issue, or does she just prefer that you feed her? From the picture on your ticker it looks as though she doesn't mind getting messy! Have you tried a variety of finger foods, fruits, veggies etc? Does she eat at the same time as the family? Riley enjoyed sitting up at the table, on our laps or in his highchair, and would eat (or just play with) bits of food off our plates.