Get ready for a new addiction! Most poeple are very helpful to new shooters.
Instead of going over strategy and technique, I'll go over the proper protocol, etiquet and saftey procedures. If your shooting your CCW weapon clear it before you get on the action range and have your eyes and ears ready at all times. Every IDPA match I've been too has been a cold range, gun in the holster, mag out of the gun hammer down. No handling of guns except at safe areas. They will have safe tables to practice draw or work the action of your gun, etc...no ammo at the safe tables.
Here's how it will go.. you'll do a walk through of all the courses before you begin. Have the scorekeeper put you close to last so you can watch what other shooters do. Your name will be called and you go up to the starting box. RO will ask if you "understand the course of fire". He will then tell you to "load and make ready" you'll put in a fresh mag in and one in the chamber, safety on if you have one. If your shooting in SSP (double action autos and glocks) or ESP (XDs and other single action guns) you're 10 +1 so load 11 in the mag and chamber one. If your shooting CDP (1911 45s) you're 8+1, in most cases you'll need a barney mag to load one in the chamber and put a fresh 8 rounder in. RO will then say "shooter ready?"..."Standby!" ....timer will go BEEP!!! and your off...you'll draw from concealment (so dryfire practice at home clearing your cover garment). When your done RO will ask you to "show clear"..."slide forward".."hammer down" you'll then holster and they'll score you.
Misc things...Be friendly and open to other shooters, everyone is there to have fun. Accept criticism since there WILL be hotshots that will have advice to give and distill later. Help paste targets, setup steels, etc when your not shooting. Be careful of the 180 rule. Take your time and be smooth. I've seen so many new shooters go to fast to try to keep up with the more experienced shooters and they can't hit anything. Have fun! Explain to your wife why your late and at the range so much and up late dryfiring!