This one-minute video shows you exactly how to take a course on TCA. It goes fast, so you may want to watch it a couple times to get your bearings. In any case, you'll explore the intuitive User Interface and the features that make TCA easier and more enjoyable.
Register - you only have to do it once to take any course - look over the course catalog, click on a couple courses that look interesting to you, and start watching some really great videos. If you have any questions, just use the Contact Us link at the top of the page.