I used to have a couple of aquariums a few years back. I've never owned betas before but I do know about the bloodworms. I used to have an elephant nose and it loved bloodworms. The ones that I got were frozen and you would just break off a little bit and put it in the tank. They don't look like worms at all. My fish used to go crazy for them!
About him sleeping on his side. Fish do lean more to one side if there is more light on that side than the other. My fish used to do it every once in a while when the sun would shine in one of the windows. My Jumbo Pacus used to do it because one side of their tank was against a wall and the other side faced a window.