If you do not know your password, you can always request a reset link from the login page, using Forgot Password.
If you do know your password, and would like to update it, you will want to start by signing into your Learner account.
Once you are signed in, click on your name in the top right corner, and select Account Settings.
Select Edit
Enter your current password, then create and confirm your new password. Password requirements will be indicated, and may vary, depending on the organization you are associated with.