Discovery is very much like belonging in that almost every text has some aspect of the concept within it. My related text was 'Heart of Darkness' by Joseph Conrad, an excellent novella. Other texts that people I know did include 'Looking for Alibrandi (film/novel), Memoirs of a Geisha (novel), 'Tracks' by Robyn Davidson, and Tim Winton novels/short stories. Look for texts that can show different types of discoveries such as self-discovery, relationships and places, and positive and negative discoveries too. You're only at the start of year 11, you've got plenty of time to read and view widely and find a text you like. Don't stress and good luck!