One thing I learned from Portl is that you should choose your objects wisely as different objects will drive different actions. For example, if I wanted her to nose press rather than pick up the object, I would have chosen a box. If I wanted her to stand on the object, I would have chosen an upside down bowl. Here she is learning the new cue for picking up a ball and a sock. (She used to steal my socks and destroy them all the time when she was a puppy and now if I leave a sock on the ground, she will bring it over to me expecting a treat). So she has a long reinforcement history of picking up both of these objects.
Here is the first training session. Note that there are a few missteps here. I think that I could have made her life easier by starting with the “pick it up” cue, however she figured out what I wanted (like always).