Welcome to the forum!
As stated, there is a link at the top of the page, and another link on the right hand side of the screen under the Main Menu entitled
Linux Tutorials. Also, there are many other sources for linux tutorials (video, written ...etc) if you just do a quick internet search. Some are better than others but if your a newbie all exposure helps.
You will have fun and learn a ton with a little patience.
Regards