To be brutaly honest you don't just buy birds and then say Ok everybody I am a breeder now see see.
You have been doing alot of reading and it's nowhere near the start, in order to be a successful breeder you must know your breed inside and out because those who will be looking to buy should also know the breed, and when they ask you some very specific questions you have to be able to answer without a doubt and be truthful. If you can't or just admit that your just getting started and don't know that much then your as good as dead in the water, when people search for a better example of their breed of choice to buy they look to move beyond the mutt hatchery junk to breeder professionals. You can't just repeat what you'v read, people will see right through that, you have to know your breed and I mean know the breed, getting a copy of the SOP for your breed will help.
Go to as many shows as you can, get with other show folks who have your breed, talk to them, remember them, and pay attention to what they want to teach you and they will, we love teaching people about our breed. My advice is this.............. try and find some good birds, work with them, learn about them, only you can tell when your ready to sell some birds.
Keep in mind your not a breeder just because you have a few chicks to sell, a breeder is a badge of honor worn with respect for the breed and your fellow breeders. and that takes years.
I do wish you the best of luck in any way you choose to go and if you feel like you may want to visit more feel free to PM me, and I will be more than happy to help.