You can see my blog post at
http://www.mycpptutor.com/blog/2015/03/31/how-to-get-unstuck-on-your-programming-assignment/ to help with this. Specifically, the "plan" section and the "focus on requirements" sections might help.
Let's try breaking this down...
1) You need to have an empty course. This means in the constructor, you need to set CourseId, CourseName, and Instructor to something that represents "empty".
2) Implement the ShowMe function. This should probably display the member variable name and the value of that member variable (but I'm just guessing... I don't now for sure). You should be able to call it from main and you see the empty values you set in step 1. Compile and run your program to see that.
3) Try adding one setter method for just one of those member variables. In main, set that value then call ShowMe. Compile your code and run it (you should, for example, be able to set course ID to 312 and immediately see it get changed when the ShowMe function is called).
4) Do the same thing for the other member variables.
Good luck!