There are a few ways to access your training dashboard, the first step is to log in to your account.
Once you are logged in, you will find a "Training Dashboard" link in the top menu under "Account"
You can also access the courses you have taken or are registered to take in your user profile under the "Courses" tab.
Lastly, if you are in the community section of the website, in the left side column under your "Profile" block there is a link to "Courses" this will take you to the "Courses" tab in your user profile mentioned in #2 above.
Once you have accessed the training dashboard or the courses tab in your user profile, you can click on the course title to access the information about the specific course.