Omniglot is an excellent resource for learners of just about any major world language. Simon Ager has put together an exceptional amount of information about the systems used to express language in the written form, complete with images, explanations and audio samples.
Hebrew is a member of the Canaanite group of Semitic languages. It was the language of the early Jews, but from 586 BC it started to be replaced by Aramaic as the everyday language of the Jews. Since then it has continued to be used as a liturgical language and to some extent as a spoken vernacular.