Before starting the application process have a resume and cover letter ready to upload. Address your cover letter to Zoe Jackson, Coordinator, Volunteer Services & Youth Programs. Opening paragraph - say what you are applying for. Paragraphs 2 & 3 - describe the skills/experience you have that make you the best candidate. Paragraph 4 - thank them for considering your app and let them know how you can be contacted.
Read the "how to Register" PDF first. The job descriptions are attached below. Apply NOW if interested. from experience they do seem to assign the positions based on first-come, first-served to good applicants.