If you need help with deciding which supporting documents to upload, start by conducting a job search.
You can conduct a job search here: https://network.applytoeducation.com/Applicant/AttSearchEx.aspx
You can narrow down the positions that match your interests and qualifications.
Click on the title of the posting you want to apply to, then refer to the Mandatory Document heading to see which supporting documents must be uploaded to complete your application.