Just in case you didn't get it via pm:
Let's start with the concept of "the journey". In layman's terms, you start somewhere, then something happens, then you end up somewhere else (whether physically or metaphorically).
Now let's look at the different types of journeys outlined in the syllabus. We've got Physical, Imaginary, and Inner. Bearing in mind that "something has to happen", let's play around with what sort of thing that might be. A Physical journey obviously involves physical activity of some kind. You might start an imaginary journey off by hallucinating, or daydreaming. And an inner journey (going by the words, anyway) tends to look at emotional or psychological journeys - anything that changes things on the "inside" (ie internal --> Inner).
You've got the concept of the journey right, you just need to look at it from an "Inner" angle Remember that the different "categories" can have some crossover points, but you need to focus mainly on your specified journey. Suggested stimulus texts include Journey to the Interior and The Road Not Taken (or whatever).
In regards to languages - I'm not an uber-fancy language-user myself, as I tend to choke (either physically or mentally) when I try to pronounce multi-syllable words. I'll use the proper technical terms when required, but otherwise it's more or less like what you see here in regards to language. And I did fine
HOWEVER: A key point in regards to the HSC English syllabus is level of language, otherwise known as degree of formality. Students are expected to use a formal tone in their responses, as demonstrated in this excerpt.
^ You see, you don't have to go overboard with language, but speaking formally can actually make quite a difference. That being said, I've never seen any of your essays - you do have to construct your sentences properly, use language appropriate for your audience and level of formality (all of which could come under the umbrella term of "language", if your teacher is feeling lazy).
One last thing - you've got about a year to work on your language Good on you for looking at fixing it now, but don't bash yourself over the head with it just yet
Best wishes!