The best place to start is here.
While you’re still in the teething stages you should consider downloading and checking out CSIDE. It has some built-in beginner tutorials and example code for precisely the sort of thing you’re still trying to figure out for yourself, as well as lots of other handy features. For instance (with the right setting turned on) double-clicking a command line in your code will automatically launch your default browser (or open a new tab) and take you straight to the Wiki page for that particular command.