WordPress has a very convenient method of getting help. If you click on the Help link in the top-right corner of any admin screen, you’ll see links to helpful documentation. First click on the general category of help that you need.
Next, find the specific category of help that you need.
The link will take you to an official support page with detailed information about your chosen category of help.
Remember that WordPress is a large community driven project. If you have a problem or question, it’s often fastest to search on Google for an answer.