RMIT uni (and most of universities in australia) will have intake 2 times a year, depending on the major as well. around feb (which you must be able to complete your foundation before summer holiday or the latest is january), then mid july or early august. so a few months before the date, you will be required to apply (usually RMIT will give you special date to apply, since u're foundation studies student).
when is your foundation studies starting? is it around august? usually take about 8 months to 1 year rite? 8 months is for the fast track one.
i think after first term ends, you will be required to choose your future major.. correct me if i'm wrong. i didnt take foundation studies before, but i chose to take certificate and diploma which is good, but i did know what i was going to study in the beginning. RMIT foundation is really expensive rite?