Well, look at a practice NCLEX book
from the library. Don't spend on the money on it right now till you're closer to your test date. I would also ask what books they recommend. I also would avoid spending on a bunch of apps or review books till you are close to the end date.
I would also begin looking at prices for good stethoscopes. I love my Littmanns. I would also find out about uniforms and whether you have to go through a certain vendor. Some vendors will have have coupons for them. I would also find out about the rest of the gear. Do you need bandage scissors? What about hemostats? Do you need a penlight? What about shoes? Can you wear regular white tennis shoes or do you need leather tennis shoes with no mesh?
Some things I've learned to love: Compression stockings. Stethoscope watch (I hate watches in general). Basic information badge cards to store behind your ID. I have one for basic labs, for vital signs, weight conversion, and pregnancy due date estimation.
I'd also consider getting compression stockings for clinicals.
Another thing some people love is the clipboard with a lot of basic info written on it and a calculator built into the top. I don't use one but some people love it.
Look online for report charts. Some people love them.
Bigwords.com will help you research book prices among a variety of sites for the best price.
Don't jump ahead too much with the learning. Reading up on peds won't help you when you're in adult med-surg. I would ask your teacher for a syllabus and what book. 99% of the teachers have been willing to give me a syllabus and what book they use when asked.