There's nothing to worry about!! ACLS isn't the millitary drill that it used to be....at least not at my hospital.
The attitude they conveyed to us was; as long as you go away from here knowing more than you came with, that's what counts. The thoughts are that you WILL NOT BE ALONE DURING A CODE. It is definately a team effort. I came away learning a lot during the two days of ACLS.
The only thing I can think of regarding preparation for the course is a good understanding of Telemetry rythms....what's life threatening, what's not life threatening. Just look over the ACLS logorythms a couple of times before your class. They go over them again, and again, and again.
You'll be fine!
Anne