No layer management in my blender how do I locate?
Well, Blender has changed a lot since that, there's no more layer system like in the olden days, now is all about Collections. You can do a couple of things... you could download the Blender version that is being used in the course so you can follow along peacefully. For that you can go to Blender.org and hit the "Download Any Blender" button. Linking you up here:
https://www.blender.org/download/previous-versions/
Or you can watch this course which lists all the changes Blender went when it made the big change:
https://cgcookie.com/courses/moving-from-blender-2-7-to-2-8
Or you can watch all the fundamentals first, get used to Blender so when you see an old tutorial you know what to look for, even though is not in the same place. Here's a playlist of the Fundamentals:
https://cgcookie.com/playlists/15-track-the-fundamentals-to-become-a-skilled-blender-artist
I know this was months ago, but I'm going to post this here for anyone who wants the info. In 2.83+ There is an addon called Collection Manager.(It was introduce in 2.82 but the layer system wasn't added until 2.83) This gives you the layers layout in the header/Toolsettings area. Also when you press M to move to collections you can create new collections give them names and to the left of the name you can assign the QCD or layer number from 1 to 20. Also most of the features in the layer manager are can be accessed through pressing M. This may make it easier to follow this. I also like to use it when I'm having to organize a file with a lot of objects that wasn't organized.