Soleil,
First off, go to the Careers Tab, select Training and Education - Officer Training at BRNC. This has a number of sections including a link to a microsite showing videos on various aspects of training (including all the leadership exercises etc). The other link from that page takes you to the BRNC establishment homepage. This further details training at the College, up to a very thorough run through IFT.
For job specific pipelines, eg Marine Engineering Officer, some basic stuff can be got from the HMS Sultan page and the sub-page for the RN School of Marine Engineering. Further info can then be got by goin got the Careers tab, Exploring jobs - MEO.
This sheet (Lvl 3 careers pub) can also be given out by the ACLO/AFCO. This gives a little more info on the selected job, which for Warfare talks about the training post-BRNC.
Further to all that, there are a number of web chats from Warfare and Engineering Officers (for example) which give a personal viewpoint on that career.
If someone can give me a run down on that info, and have some drive and ambition, I'd be content. The icing on the cake is to go on a ship visit arranged by the AFCO, or an acquaint course (talking Officers again) for their chosen branch.