if you have the download version, then to complete these, you need to click on Help in the program and
choose to download these. Do so in chronological order. If it is a download version, then make sure it activated correctly, as is not still in trial mode. Hope it helps.
As Man o Lakes has already given answer I would like to add more.
When we buy download version example Music Maker 16, we get email from Magix with details and also download link. When we download that install usualy three styles, Or if you are using trial version that also got 3 styles I think so. In case of trial version I can't help but if you got purchased download version then you have to download extra free contents from the Magix website. You have to click on Help then follow guidance.
You can see details in text and images in this pdf tutorial. Just open it and see at least once you will learn a lot.