Yeah, ask as many questions as you can think of, but try to make them specific to make it easier for us to answer.
For newbies, I'd suggest that you watch as many videos on betta fighting and betta breeding. . . . Just the flaring part. Compare how they flare in the two modes. When fighting, they will flare and hold their position. They might flare/swim left-right, trying to break through. But in breeding mode they will literally swim all over the tank in an "S" style then return to flare again. Understanding their body language is important in betta breeding because males may kill females if either one isn't in breeding mode.