Is it possible to ask some of the places where you’ve already interviewed if there is anything you can improve on for next time? Maybe to gain some PT experience, you can try volunteering or shadowing a PT at a local hospital first. From my experience, a PT Aide should know a bit about the body and physical therapy, and be open to learning more. An Aide should be responsible, and able to multi-task and take criticism. And an Aide should have good people skills to be able to work well with both fellow employees and patients. Good luck in the search!