firstly, DONY WORRY!
the type course exams are no different from the technical papers you sat for your 66. if you have any fears try to stay on late after class with some others and quiz each other on that weeks subjects. in all the courses i've been on, nobody ever fails. if you need a resit, no problem! talk to the older guys and they'll be able to put your mind at rest.
and lastly, GOOD LUCK!!!