Here is a link to the sticky at the top of this sub-forum, it will give you links you can use to help breeding. There is a ton of information you need to know in order to properly breed, and those links will help give you a good start at it.
The person(s) who wrote those topics/links in the link below has been breeding successfully for a long while, and it also follows the ways of many others who breed in large numbers. I would highly recommend going more off of what the links say, as breeding and raising fry isn't simple at all.
Breeding Bettas