Whenever you have signed in to the Cooperative, you can go to 'My Page' in the menu above and change any of the information shown on that page.
For example, you might want to change your answers to the profile questions that were filled in when you first joined the Cooperative (during the Sign up process).
To do this, use the 'Settings' link in the panel in the upper right side of your page. After clicking on that link, you can go to your profile in the editing panel that appears in the upper left of your page. In the same editing panel, you can change settings for the appearance of your page, your privacy requirements, and your email account.
You can also use your profile page to run a blog, which appears at the bottom of the page. You may need to scroll down to find it.
To change your profile image, look at the links under the image.