Hi welcome to www.bettafish.com
glad you are here!
It is great you want to breed and I will support you however if you don't breed responsibly I may become your worst enemy *evil laugh*
Anyways back to the topic, please read the stickies in the breeding section as they will be most helpful :)
NEVER breed your Petstore Betta Because you like their personality!
I can't stand people who figure they want a whole bunch of crap finned ct's with a "nice" personality.
I hold nothing against pet store bettas and breeding them IF they have good fin age I recently found a hm with half decent fin age at Petsmart :o i will be breeding him but responsibly meaning he will be paired with a quality female who will even out his faults.
Before you breed make sure all your bettas are living in good conditions I would check out Craigslist and purchase five gals with heaters for all your breeding stock and bettas. Then a ten gal with a heater and a bubbler for the spawn tank you then will need a grow out, cultures, IAL, ect.
I would talk to breeders in your area for breeding stock unless your bettas are right age, half decent fins, and good couloring.
Please post a pic of your bettas and their homes.
Feel free to ask me or send me a pm if you have any questions or want to talk :)