Good Luck Dolly
I am sure your course will be just fine.
I belive it is 4 days now not 3 when i did mine.
Just I few things I would say from my point of view.
Firstly with regard to your briefing (which is filmed as you know) practice practice practice ready. Also think of SEP questions in a SCENERIO format whicgh gets the group all involved, and try come up with a scenerio that is not the usual fire, decompression ect. Think of maybe a unplanned emergency landing, gear failure on landing.what will you crew do to manual and initive and then incorporate first aid to fit the scenerio.
Its not a bad course, I expect they still ask you to write out your 10 point drill.
And you will do some scenerios in the sim.
Annyway good luck