I think you need to slow down.
Respectfully, I really do think that you are running before you can walk. Breeding fish is an art that requires years of experience, especially when it comes to the highly aggressive types like Betta
I understand that you might be excited to go onto the next level of fishkeeping but it would be better for you and the fish if you gained more experience in the basics of fishkeeping before embarking on the more complex, financially & emotionally harsher side
When you have a few years (5+ years) successful fishkeeping under your belt and have more expertise and confidence...then maybe look at breeding for monetary gain. But right now, and in light of your confusion over the gender of Disco, I truly believe you need to wait a few years, get your experience, keep learning new aspects of the pastime and just enjoy being with the fish that you have. The last thing you or anyone would want is for you to rush into things that you don't really understand fully and don't have the time for (bearing in mind the question posted about cutting down on the time taken by reducing water changes etc) and for it all to go horribly wrong.