music 1

all I know about these things is that you can get a nomination for performance/comp/choreo (or equivalent), what actually happens once you get nominated? do they pick the best out of the nominees? is there a step in between after nominations where nominated people have to like put their name...

I have my HSC next year(2024), and I'm freaking out cause I haven't even decided my pieces yet. Can someone please suggest some good piano performance pieces for HSC? Thank you so much in advance