I would recommend sitting at your desktop to do the course. Do most of your work there. Think of the phone option as an easy quick reference or a way to watch videos in between patients ;)
For desktop use, there are no special instructions. Just go to school.implantninja.com and log in with your credentials. (You've probably already done that...it's how you're reading this right now! lol) Make sure to bookmark this page on your desktop at your office or home computer.
For phone use, make sure to download the "Teachable" App and use your login credentials to access this course. I often pull up this app in between patients just to refresh my memory.
If you're going to watch videos without WIFI, try downloading them all to your phone first when you do have WIFI. That way you don't get any lagging video when you watch them later on.