Aha, another "3 day wonder", who thinks that a piece of paper will make them an electrician.
With all due respect, I'm afraid becoming an electrician requires more than a 3 day C&G 2382 17th edition update/refresher course. The college shouldn't let you enrol on the 2382 without a prior C&G Electrician qualification like C&G 2330 or the old C&G 236 (pre-1989 I think when the 4 figure course numbers came in). It's an NVQ level 3 which requires a minimum of a level 2 qualification as a pre-requisite for entry, or holding the 2382/2381 for the previous regs (16th Edition).
Either way, if you have no previous electrician training/knowledge or experience you will be so out of your depth as it not to be a problem, you won't pass the exam at the end. Just reading the IEE 17th edition wiring regulations ("The Red Book"), which you will have to know inside out and backwards, will blow your mind. Actually understanding them only compounds this effect!