Hi Morwen, good to see that you continue to be enthusiastic - that's what (relative) youth is for. Are you asking for more hints about your singing? If you still have your voice trainer, best stick to what she or he tells you, for at least one year, unless you have reasons to doubt her or his competence.

If your uni plans are concrete enough, you may also profit from preparing yourself. For example, if you learned any foreign language, brush up your grammar - invaluable! (I once held a talk to an audience of young musicologists, quoting a text in French, and heard them protest "We learn Latin and Italian here; French is not required!")