As you see, the C&G 2382 is
not an entry into being an electrician, it is for practicing electricians, who are already qualified, to get a formal certification to show they are fully au fait with the latest wiring regulations. You need the C&G 2330 {Certificate in Electrotechnical Technology } or 2360 (Electrical Installation, used to be 236 when I took it in the early 80's!) to begin with. Have a look here;
http://www.cityandguilds.com/cps/rde/xchg/SID- 3C9C3882-89DF9815/cgonline/hs.xsl/1107.html
You need to start at the beginning with an understanding of basic electrical principles and installation practice and methods. There is a lot of circuit design and planning involved in being an electrician, as well as testing and certification. This is all integral to the 17th edition regulations and 2382. I think you have been very badly advised and should take a good look at the City and Guilds website to get a truer understanding of the correct route.