I’m sorry I haven’t found it in Spanish. Anyway, all characters speak quite cleary, so I’m sure you all will be able to understand it.
As I’m sure you’ll notice, it’s not exactly Homer’s Odyssey (we could better name it “Odysseus’ story”). However, you can learn a lot from this movie and build a general idea about characters, adventures, gods and godnesses, ancient greek life style, and so on.
It will take you about three hours to see the film, but it would take you much more if you had to read the book, which I strongly recommend you. It’s up to you!