You will enjoy the sport.Generally in IDPA most stages will be around 12-14 rds.Rules prohibit more than 18.Also distances will be shorter 12 yds or less most times.You will be required to shoot on the move on some stages as well.JMO but as a former IDPA Safety Officer,USPSA Range Officer and a Match Director I strongly suggest just watching for the first match and taking note of how things are done.Observe the loading and unloading procedures of the gun before the start and after the end of each stage.Notice how the shooters shoot on the move and how they keep the finger off the trigger and the muzzle uprange when they are moving to another position.Practice doing those things before the next match.It will make it easier on you and the Safety Officer as well.