As the previous poster said, commit to at least having the memory items/limitations covered. If you know those flawlessly and want to start learning about what you’ll be flying, you can also pick up the spiral bound CRJ-700 study guide by Nathan Leming. There are a handful of discrepancies in the book, so don’t build your flash card deck until you have access to the official company manuals, but overall it’s an excellent overview of the jet.