Hey! Sorry for my late response!
How does the perform music as a soloist elective work
Hmm, not quite sure what you mean. Basically at the start of the year you're given the choice to either work in a group or by yourself. If you choose to be by yourself, then that would be solo performance. Hope that answers your question!
where is the VET subject offered?
VET is offered in some schools, you'll have to check to see if yours is one of them. If not, you can always do it at another school which offers the subject if your school allows for it. I've heard that there are also specialist music schools out there that offer the course, but I don't have any experience with that.
how can you develop your improvisation skills?
(I know you asked me this in the PMs, but I'll just answer it here just in case anybody else also finds it useful, or if others have tips and tricks to share)
Regarding improvisation skills, I practiced by reading chords rather than sheet music. I'm not classically trained so I can barely read sheet music anyway
exposed but chords REALLY help. Usually it's easy to start with the (very overused) 4-chord pop progression (I–V–vi–IV) or the Pachelbel progression (I-V-vi-iii-IV-I-IV-V) and just keep building up from there. Start with something easy like C major then apply it to harder keys. With practice it'll soon come naturally.
Btw, I'm not too familiar with the classical AMEB syllabus, but a grade 4 in theory seems pretty solid IMO (isn't that a grade 7 practical? You're pretty much a professional!) I've only done the
AMEB-For-Leisure grades and I found those hard enough lmao.