E-mail the currently designated ECC Wiki-master, Mike Richardson, who will confirm you are a current SSR member and create your account with authoring privileges.
How to report unprofessional, HIPAA non-compliant or offensive content
All the tools you need are along the top of the box on the edit screen. Just start clicking and previewing. You'll figure it out.
Use an internal link (chain without the globe button) to make a new page. Save. You'll be prompted to add content to the newly named page when you click on that new page from the regular page view.
Upload images and documents using the icon that looks like a picture frame while in edit mode. Leave the separate upload window open. Put your cursor on the page where you want the document inserted. Double click the document you just uploaded and it will be added to your page.