Welcome and good luck on your journey. Everyone is different on their study prep, but I think you have a good plan thus far. I myself spent over a year studying, gradually increasing the amount of time spent each week studying. Your study sources are very good. The NCEES practice Exams, Engineer Proguides, and Electrical PE Review are the top 3 references that I used and reccomend.
If you haven't already, you should print our the NCEES refence sheet that they will give you on the exam. That is essential to know that document forwards and backwards. On the NCEES dashboard, you should be able to download it under "Useful References".
You should take a look at the engineer pro guides code question exam that covers questions on the NEC, NFPA 99, and NESC. These make up a good portion of the and are much easier points to earn with less chance of error compared to other problems. Many of these are available online for free but the
NEC handbook and
NFPA 70E would be a good recommended purchase. if you don't have these. The NESC is a bit pricey but you may be able to find used ones, many of the NESC questions you might see are similar to the questions you will see in the NEC but does deal with a different subject matter at times. At minimum you should have a good knowledge of NEC articles 110, 210, 220, 240, 250, and 310, 430, and Chapter 9.