Members can sign up for roles by editing the agenda pages.
Since you can already see the member pages, we'll skip the login instructions.
If you are able to edit a page, you will see a pencil (edit) icon at the top of the page. [Please do not add new pages under the agenda section.]
After clicking on the edit icon, you will see an edit toolbar, and save/cancel buttons. Please save or cancel your work before leaving the page.