RE: new to archery
Richie,
Welcome to the great sport of archery. If you need to find out anything regarding rules for 3-D shooting, go to ibo.net and check out the Rules section. There you should find everything you may need to know about IBO 3-D shooting.
A 4 inch group at 20 yards is really good for a starter. Just keep shooting and before long you will not be happy with a 4 inch group at 30 yards though. This is a very frustrating sport, at least for me it is. One day I'll be hitting the X (bullseye) everytime, the next day I won't be able to by an X. What makes it frustrating is that I know my equipment hasn't changed so I know it is me that is messing up.
As far asa finding a place to shoot, check the web, you should find all kinds of 3-D ranges near you. IBO has a listing for IBO clubs on their web site, look there to see if any are close to you.
Steve.