How to join a group
Step 1: Login
Step 2: Go to groups page
Go to the 
'Online Community Links' 
box and click on 
'Groups.' 
Step 3: Find a group you want to join.
Next to the group title, click 'Join.'
Then you will be asked if you are sure you want to join this group...
After you click 'Join' (for the second time) you see this message:
Now, when you click on the 'My Groups' tab, you'll see the newest group that you joined listed there. 
When you click on your group, the group page will look like this:
The next time you login, you can access your groups by going to 'My Details' and click on 'My groups.'