Kim,
Have a read back through this post. I you are seeking entry through Advanced Entry program then you should be well versed in your aviation theory. There are a few suggestions in the post about books to read, the first that jumps out is Handling the Big Jets.
CX has recruitment year round, there are no set dates for offers to go out. If you make the cut you will get an offer for a course. If this fits with your university that is a question only you can answer.
KG