Maneuvering through a category list can be hard if you are not entirely certain where to look. First ask yourself if it is computer related or not. This should be easy to answer and puts you on the right path immediately. If your answer is yes, you need to decide if it is something with a test/exam at the end that gets you certified in something. From there it should be pretty easy.
When in doubt you should always try the search function to look for the name of the specific course you are after.