Well....when you registered you had to fill in some profile fields. and a profile was created for you.
The first step will be to edit your profile, complete any fields that you omitted when you registered and to make sure your profile is up to date.
Click here to edit your profile
Next will be to upload a profile picture (avatar) if you didn't do so when you registered your profile.
Click here to upload/change your profile picture (avatar)
Setting your profile privacy will help control who can view different parts of your profile
Click here to change your profile preferences and privacy