At the top of any forum page click the Tutorials link. In the page that opens refine your choice of tutorials to Audio - there you will find many tutorials on using Music maker - most will refer to older versions, however many of the the principles are the same, effects and some items may be in different places.
There are also tutorials on Magix.com under Music Maker, and on the Welcome Screen when you start Music Maker - right in the middle of the screen (hard to miss). The tutorials on Magix.com can also be accessed from within the program under Help, Documentation.
I suggest that you also look at what is on the screen in front of you - buttons, menus, etc., and learn what they do. Most come with hints. Under Help, Documentation, download and read the manual.