I would suggest you read content.php/4-Avatars-and-Profile-Pictures. At the same time, set your editor
First, click on your profile settings. Depending on which style you have chosen the link may look like this:
Or this:
That brings you to your profile settings. Here's the left side menu.
Click on "General Settings, about in the middle. At the bottom of your page you'll see this. If you have a relatively recent computer you should have no problems using the Enhanced Interface."