Yes I agree with Hallyx... Have you actually kept Betta before this? It IS complicated!! And if you are successful you will be quickly faced with 100+ fry that will quickly need their own separate home. Who will keep all these babies? It's just a huge endeavor.
Breeding Betta is a difficult and expensive hobby that should not be done until you have the knowledge and finances to do it properly. There is information on this forum and on the internet. It's a steep learning curve, not something I can help you with in this message.
From your question I can tell that you are not ready yet. You need to read up and study. You should start by keeping a Betta or maybe several for a couple of years. By that time you'll know enough and will be able to ask the right questions and understand the answers. This is a complicated hobby that some people spend most of their lives learning about.
Start slow. Read. Ask questions. And enjoy your fish.