You may contact them from the contact us on this site.
Prior to doing the course you need to get a unique student Identification number.
To do this go to www.usi.gov.au and apply. Please bring the printed form with you.
Courses are held every month, but the course can be arranged at a time to suit you. The statement of attainment required for your weapons license is available 2 days after the completion of the course.