Visit your Home page
1) Click on your Account drop-down
2) Click on Account Settings
This leads to your Account Settings page.
Select the Profile tab
3) Click on Edit to change to updated your profile
You should see a screen as shown below.
4) Click on Upload to change your avatar
5) Change your Username or Email-address
6) Change your Password
7) Once you are done, click on Save to update your information
(Click on Cancel to abandon the changes)
You have successfully updated your personal information.