Try using one hair band just for tying your hair ina ponytail. Then twist the hair round til it naturally starts curling up into a bun. Secure it with another band. Now try pulling a few small bits out, gradually a few more till youve done as much as want....try not to pull too much out though as your hair will just get too loose in the hair band and fall out. Hold it in place with hairspray.
You may need to practice a few times to begin with.
If you still struggle, I know it isnt easy to do syles on your own hair, try asking your hairdresser how to do it.