Take the prong off the puppy before you ruin him. Stop correcting and start over. Everything should be positive at his age.
Why are you using a hula hoop instead of food? Find and use something of higher value and use that.
Puppies that age don't have much of an attention span. Keep training short. 15-20 minutes tops. Just do them several times spread throughout the day.
Is he in a training class yet?