Breeding is a serious and a very committed thing in keeping birds. I would recommend having one as a pet first as Ann333 mentioned. Breeding isn’t a hobby, you’ll be responsible for 3, possible 5+ lives.
You have to have: experience with the species your'e dealing with, in-depth knowledge, lots of time, and money. If you do plan on taking breeding very seriously, I would try to get in touch with local breeders to see what they do and hopefully take you under their wing, as well as making a good relationship with an avian vet in case something goes wrong during the breeding process (egg binding) or after (deformities, one is getting picked on, the parents abandon them). Some breeders go above and beyond by socializing their birds from an early age with training and hand feeding.
I don't want to put you down, but I wanted to do the same thing when I started. I thought I knew everything but there are lists of things you need to know how to do like dealing with deformities and hand-raising them if you plan on hand taming and or if the parents abandon them. Not to mention, prior, your breeding pair must be 100% free from any illness' which means a full round of blood tests and have a proper breeding diet and other supplements. It might even go to waste if the pair chooses not to reproduce. That alone may cost about $500 if you pay attention to every detail.
You can guess their genders depending on their sizes, females are usually larger but that's a 50/50 chance until she starts laying eggs.
For best feather conditions, it’s extremely important that they get their vitamins and minerals through their food. Pellets are a good option but the best way to go is fresh foods to mimic what they would eat in the wild. Seeds and other treats like nuts should be moderated.
The prices of birds depends solely where you live, the condition they’re in, the species, and how they were raised. Breeders are usually cheaper and healthier but don’t knock down pet stores. Some stores can be cleaner than a breeders and vice versa.