If you are having a hard time remembering the original password the system provided I don't blame you. To change your password to something more familiar all you have to do is click "Change Password" which is located at the top right corner.

Copy and Paste your Old Password followed by the new password of your choice. You can pick any password you want. Since there aren't any restrictions you can have it as long or short as you wish. 

An email will be sent to you just to confirm the information you've provided in the text fields.