Welcome to BYC! So glad you could join us! You might could look on Craigslist for your pullets. I do know that Murray Mc Murray sells wyandottes as chicks and you can look on local Facebook chicken groups and they might have what you need.
Belated Welcome to the coop! I use the Forums and Articles tabs at the top of the page to do research. You can get lost for hours. It's nice to know you are minutes away from getting help with questions and emergencies!