[26 Year Gap]

I am entering my 3rd year, too. [Well, 5th if you count those 2 seasons back in the 1970s]. I am going to a required referee camp to enable me to do varsity games. If you want to do varsity games, then hang for at least the first half of the varsity contest and try to sit in on the halftime talk. You can pick up a lot of good advice that way. Thre are plenty of guys who do not do that and do alot of what Rut said.
We have an old guy [old is older than me] that wears his watch on one wrist, his medic alert bracelet on the other, signals jump balls with his forefingers, never closes in as the trail, calls 3 seconds from mid-court, and many other textbook examples of what NOT to do. [I am willing to cut some slack on the medic alert bracelet.]
Another guy comes in with his shoebag as his duffle as he is completely dressed otherwise and his car is out of the lot before his partner has unfastened his whistle.
Still another, who now thinks he is ready for college ball, is on his cell to his wife during halftime so you cannot go over things from the first half. Pre-game with guys like that? {Think 'Jim Mora" as you say PREGAME}.