Check out this site that I found.
I have had many bettas, they are great fish. I actually have one now named George.
Definitely go with the worm thing and only feed once a day. The container says to feed twice but they don't need that much. Also make sure that you treat the water before putting the fish in. There is a water treatment specific to bettas.
They like the water to be warm and you have to make sure that if you have a plant in the water that they can still get to the top to breathe. Bettas do not have gills and need to breathe from the top. If you notice that they are blowing sticky bubbles, then that is a good thing, means that they are happy.