Buck,
Try and spend some time at the table observing how a good R2 administers the match. As a baseball umpire moving into
VB, I found the R2 job much harder to learn than the R1 job. Like you, I understood how to "see" the play and make a call, but efficiently managing substitutions and the table took longer to get.
Learn how scorekeeping is done properly. It's not unusual for the referees to give scorkeeping and libero tracking lessons before a high school match when the student managers don't have a clue.