Not stealing the thread at all... That's our intent: to get more people involved in this great sport of archery, and if we can bring in some more 3d shooters as well, that's a bonus.
There's generally two governing bodies for 3d shoots: IBO and ASA. Local clubs will generally adhere to the guidelines set forth by one of those two sanctioning organizations, even when it's not a "sanctioned shoot."
Most people seem to start off in the Hunter Class, and eventually step up to MBR (Male Bowhunter Release) or Open Class.
For ASA shoots, the max yardage is supposed to be 40 yards, and you're limited to a stabilizer no longer than 12" and four fixed pins. ASA does offer a bow novice class as well, with the max distance set at 30 yards. A person may compete in this class until they win $300, at which time they must move up to Hunter or something else.
For IBO shoots, the max yardage is supposed to be 35 yards for Hunter Class. There is a "fudge factor" built in though which will allow targets to be set a couple yards past the max distance, to account for differences in rangefinders for the person setting up the range.
Keep in mind,local clubs can do anything they want... especially if it's not a sanctioned shoot like a state qualifier.
Today, we were generally going by ASA rules, and we shot in a class called Male Bowhunter Release. I know after we finished shooting from one stake, I pulled out my rangefinder (which I only ranged a couple targets AFTER we had all shot) and hit the target at 45 yards, so we had some targets that required a poke to get to.
But don't let that scare you off... If you want to go toa shoot and just have fun, no one's going to care where you shoot from if you're not trying to take their trophy from them.
You can also do what I did my first couple shoots: I knew I wouldn't be close to being in contention for podium finish, so I paid my money for a "fun shoot"... a lot of clubs have that set up and it's usually like $5 cheaper than the guys going for the hardware. I was just trying to get my feet wet, and I was only shooting against myself.
I'd encourage you to give it a try... it's a blast, clubs usually serve great food at the end, and it's usually a good family atmosphere!