Paradise Lost Prerequisites?

Sorry if this is the wrong place to ask, but I'm a 4th year math major who's a English noob (I've only taken intro to rhetoric and intro to linguistics). I'm considering taking a 3rd year English course next term which studies Paradise Lost. I have no knowledge of the Bible and minimal knowledge of Greek mythology. I emailed the professor who was very nice and she said that it shouldn't be a problem, but am hoping for more viewpoints here.

I really want to get back into reading (I've read some classics like Crime & Punishment and Grapes of Wrath back in high school), but am I biting off more than I can chew here?