RxPrep is probably a single most useful resource for NAPLEX; good summary tables and very similar question format to real NAPLEX. I would highly recommend going over their mock exams, I remember they offer two (or more). If you need additional questions for calculations, there are many resources available online or your school may have some support.
There's a lag time before new information is incorporated into the exam so if you have 2019 you will be fine. If you have 2018 version, hit major guideline updates and/or new drugs in 2019 (diabetes, HF, Hep C drugs etc).