Its not that hard, just follow the instructions you are given and everything will be fine.
i took mine just under two months ago and it may differ a bit from yours, but mine started out with about 2 hours practicing in the car park, learning how to put the bike on the stand, controlled stops, figure 8s', circuits e.t.c and talked through/practiced what to do at junctions followed by a 2 hour road run, the first half of which you will be following the instructor who will talk you through everything he is doing (looking in the mirrors e.t.c at roundabouts) but for the second half he will follow you and give you directions through the radio and observe your actions accordingly.
its nothing to fear really, the instructor wont fail you unless you are really terrible, more often than not they will just give you advice on how to further improve your skills, i had a bad tendancy to keep looking back to the right at roundabouts but have since stopped doing it
best of luck, you will probably be given one of these horrible little scooters to do it on, i chose to do my test on the DT and didnt have any real problems atall.
- Steve