Umineko no naku koro ni question?

I've watched 11 episodes so far.. Is the story basically about Beatrice and Battler competing about how Beatrice is trying to make Battler believe in her 'magic' and how Battler is trying to show her 'magic' isn't real? I'm really confused.. and all of a sudden who is bernkastel and lambda.Also how are the people who died reviving.. This is really confusing. Do my questions get answered once I watch on..? Idc if there are spoilers .. unless it's better to watch on and find out.