Jargon and what it's about
Hi Equinox
Like you I know that flying is what I want to do-and CTC is an excellent way to go if you can meet the standards: best of luck to you!
For the jargon you can read books and manuals and that will help. I learnt a lot from the ITVV Cockpit video series. They are about £25 and if you watch one or two of them you will soon find you know a fair bit about the jargon as well as what pilots actually do during a flight, what they are looking for on the instruments/paperwork and all manner of good stuff.
If you have time before the interview they might just be well worth the investment.