Lots of people argue about whether or not to keep females together in one tank, but I wouldn't put four females together in a tank together. I'd put maybe three together with dividers, that's ok...I have mine in tanks with dividers.
I know that others have kept females together with lots of plants and had great results...they have minimal aggression in their tanks.
Don't put the male in with the females. Males should be the only betta in their dwelling.
Good luck!