Dry food are not a good starter food for fry, at least not by themselves because some fry will refuse to eat it and die. Live food are the best food, e.g. baby brine shrimp, vinegarl eels, microworms, etc.
I think it wold be best if you separated the pair, researched a bit more and try again once you have your setup prepared.
You shouldn't breed your betta where they live because they are very territorial and they could turn on the other and kill them. It all can go smoothly for a couple of days and then someone looses it and attacks the other fish. Not pretty, there was a newbie here who went againt everyone's advice and his female ended up dead. Besides, you will need a completely separate tank to raise all those fry because they need to be left alone there after they are freeswimming,
If you comdition and aclimate your pair properly, you can have a spawn where neither fish gets hurt although it is common for them to nip each other a bit.
Anyway, the link I gave you has great info on breeding and raising bettas.
Here it is again:
This other one I found very helpful when I started because it goes in detail about the setup and behavior of the fish while mating:
Best of luck and don't hessitate to ask questions.