Free equine nutrition course

I did that course, I think it was about 2 years ago?? I loved it, found it very interesting, I still have all the notes on it.
 
I would be interested in that but worry I might not be able to keep up once I started it (time wise because at the moment we're getting a little busier work wise). How taxing (or not) is it?
 
newrider.com