Welcome to BYC. Glad you decided to join our flock. Yorkshire coop has given you some good links to check out. Just be aware that you are not going to get any true Araucanas (which are rumpless and lay only blue eggs) from a hatchery or feed store. Hatcheries and feed stores frequently and incorrectly market their Easter Eggers which are hybrids produced by crossing blue egg layers with brown eggs layers to produce offspring that lay eggs in colors other than just blue (usually some shade of green) as Araucanas when they are in fact Easter Eggers. If you want true Araucanas, you will have to purchase them from a reputable breeder and they will be quite expensive. Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck in locating your Araucanas.
You have some great advice already, so I'll just say a big hello and welcome to BYC - i hope that you enjoy being a member as much as the rest of us.
All the best
CT
Michael O'Shay has given you some good information regarding Aruacanas vs. Easter Eggers. Back when I first started learning about chickens someone told me if a chick cost $5 or less, it's an EE. Seems to be a good rule of thumb
I hope you find what you are looking for, good luck!