I did my sccm course a long time ago and have since left, so it may have changed. Do you still have to do a mock briefing and be video taped? Maybe worth writing out a brief outline of hour you are going to conduct your briefing.
Also, every flight between now and then, quiz your sccm, ask to do the service fromt he front and to look after the flgith crew. Sounds sinple, but valuable.
The coaching sectors are very good to have. Once agsin, anything you are unsure of, no matter how small, ask your trainer on that day as they cannot help you on your check flight.
I didn't want sccm, but it was the best move I ever made. Good luck!!!