The biggest thing you will need to learn is when and were to call an illegal hit. It is the block/charge of volleyball. No matter what you do it is wrong. However, remember this axiom JUST BECAUSE IT LOOKS BAD, DOES NOT MAKE IT WRONG.
There are tons of awful looking hits, that are legal. You are going to be dealing with players who use these rules (fed) for only 6 weeks a year. Hitting rules at the USVB level are much more liberal than the fed wants. Use some common sense
Past that everything else is pie. Coaches are MUCH more calm and normal than hoops coaches, but there is a catch (didn't think we would let you al the way off the hook), they are much more knowledgeable on the rules. Most coaches are officials as well, so solid rules knowledge is a must.
Absolutely inspect everyone for jewelry before the game.
Trust your line judges, let them make the call, and don't over rule it unless you know for sure they are wrong. It is amazing how much optical illusion occurs in the game. Try and make sure the LJ are adults. Nothing worsrethan a in school LJ chatting with the guy in the first row or picking daisies when a ball drops right in front of them.
When you flip, catch the coin, do not "flip" it back on your wrist. A coach might run you out of the gym.
And lastly, in
VB we get a DO OVER!!! When in doubt, replay.