Did you mean 'challenge'? As in you want to test out of the class? I don't believe that would be possible. Nursing classes require clinical time as well as the class time. Good luck!
I buy inexpensive heel pads at the pharmacy or Wal-Mart. I think they are 'Halo Heel', recommended by my podiatrist. Also, to relieve the plantar fasciitis try calf stretches when you wake up. Also, keep your foot from extending while asleep either by buying a special boot or just wrap in an ace wrap to keep it in a walking position.