To get help within Stata, use the Help menu. Just click on it and follow your nose. A slightly faster but less pretty way is to type
helpat the command line. This will give you a list of topics for which help is available. If you know you need help with a specific command you also can type
help commandnameIf you do not know the exact name of the command you need, but you know the subject you need help with, type
lookup subjectnameIf the help file for a command is longer than a page (you should see ``-more-'' at the bottom of the help output), you can see more of it by pressing the space bar. Often real examples of how to use commands are at the end of help files. If you are scrolling through a very long help message and you would like to get out of help, type q.