If you just start out (I assume this based on your mentioning of beginner course), then r20 will do just fine. My only concerns would be based on some re-ordering of the menu. If that creates any trouble, press the Shift key and the c key (simultaneously), then type the term used in the tutorial into the field that shows up.
I just read again through the list of new functions/options:
I can’t really find anything that would limit the R20 material.
If there is any question that comes up based on that list or any other, please let me know.
I will, however, move this post to the tutorial request, I think it is more effective there.
My best wishes.